[1] H. N. Ismail, I. K. Youssef and E. El-Shobaky, Observations on Divided Differences via Leibenitz Rule, the 14th International Conference for Statistics, Computer Science; Scientific and Social Applications, Cairo, March 1989.
[2] I. K. Youssef, F. Ebersoldt, E. El-Shobaky, H. N. Ismail and M. Elmoattassem, Numerical Model for Sediment Transport, the 22nd International Conference for Statistics, Computer Science; Scientific and Social Applications, Cairo, May 3-10, 1997.
[3] I. K. Youssef, A. E. Abu-Sabh and B. I. Bayoumi, Finite Element Treatment for the otolith Membrane Distortion, Proceedings of the 1th international Conference on Engineering Mathematics and Physics(EMP) pp51- 62 , Cairo –Egypt . May (14-16) 2002.
[4] I. K. Youssef, A. E. Abu-Sabh and B. I. Bayoumi, Isoparametric rectangular finite element treatment for the otolith membrain distortion, Egyptian mathematical Soccity, Cairo 28-31 Dec. 2002.
[5] Elsayed M. E., Salah M. Elsayed, I. K. Youssef, Ahmed M. M. Khodier, Restrictive Chebyshev rational approximation and applications to heat-conduction problems, Applied Mathematics and Computation vol 136, pp 395-403, 2003.
[6] B. I. Bayoumi, A. A. El-Sawy, N. L. Baseley, I. K. Youssef, A. M. Widyan, "Determining the efficient solution for bicriteria progrmming problems with random variables in both the objective functions and constraints", J. of KSIAM, Vol. 9, no. 1, pp 99-110, 2005.
[7] B. I. Bayoumi, A. A. El-Sawy, N. L. Baseley, I. K. Youssef, A. M. Widyan, "Decomposition the parametric space in stochastic bicriteria progrmming problem", Sci. Bull., Faculty of Engineering, Ain Shams University, Vol. 46, 2005.
[8] Abdallah A. Alkheraiji, A. A. El-Sawy, I. K. Youssef, Somia A. Asklany, A Mathematical study for environmental effects of some air pollutants in Al-Qassim region, Meteorological Research Bulletin, ISSN 1687-1014, Vol. 20 pp 107-118 2005.
[9] Khamis S. M., I. K. Youssef, El-Dewik M. H., and B. I. Bayoumi, An algorithmic aspect of finite difference treatment for PDEs including the mixed derivative term with high accuracy on curved domains the 40th Annual Conference on Statistics, Computer Sciences and Operation research 3-6 Dec. 2005.
[10] I. K. Youssef, H. A. El-Arabawy, Picard iteration algorithm combined with Gauss-Seidel technique for initial value problems, Applied Mathematics and Computation vol. 190, pp 345-355, 2007.
[11] B. I. Bayoumi, A. A. El-Sawy, N. L. Baseley, I. K. Youssef, A. M. Widyan, " An Efficient Approach for Treating astochastic Fuzzy Multicriterion progrmming problem", J. Egypt Math. Soc. Vol. 16(1) pp 109-118, 2008.
[12] I. K. Youssef," On Strongly Coupled Linear Elliptic Systems with application to Otolith Membrain Distortion, J. of Mathematics and Statistics 4(4):237-245, 2008.
[13] H. A. El-Arabawy, I. K. Youssef, A symbolic algorithm for solving linear Two-point boundary value problems By modified Picard technique, Mathematical and Computer Modelling, Vol 49, pp 344-351 2009
[14] Khamis S. M., I. K. Youssef, El-Dewik M. H., and B. I. Bayoumi, A Computational Finite Difference treatment for PDEs including the mixed derivative term with high accuracy on curved domains, J. Egypt Math. Soc.,Vol. 17(1) 2009.
[15] Somia A. Asklany, khaled Elhelow, I. K. Youssef and M. Abd-El wahab, Rinfall events prediction using rule-based inference system, Atomosperic Reasersh, Vol. 101, P 228-236, 2011
[16] I. K. Youssef, Montaser S. Ali, M. A. Ahmed, E. El-Shobaki, Picard Fixed iteration Combined with Integrating Factor Approach, Egeptiation Journal of Pure and Applied Science, 071 – 078, 2011.
[17] I. K. Youssef, On the SOR method, J. of Mathematics and Statistics 8(2):174-182, 2012.
[18] I. K. Youssef and A.I. Alzaki, Minimization of 𝑙2 – norm of the KSOR Operators, J. of Mathematics and Statistics 8(4), 2012.
[19] I. K. Youssef and A.A. Taha, On the modified Successive Overrelaxation method, Applied Mathematics and Computations, 219, 4601-4613,(2013).
[20] I. K. Youssef and R. A. Ibrahim, Boundary Value Problems, Fredholm Integral equations, SOR and KSOR methods, Life Science Journal, 10(2), 4601-4613, (2013).
[21] I. K. Youssef and A. M. Shukur, Modified Variation Iteration method for fraction space-time partial differential heat and wave equations, International Journal of Advanced Research, Vol. 2 (2), 1000- 1013, (2013).
[22] Nabil T. M. Eldabe, Ahmed M. Sedki and I. K. Youssef, Numerical Solution for Boundary Layer Fluid Flow with Mass Transfer over a Moving Permeable Flat Plate Embeded in Porous Medium with Variable Wall Concentration in Presence of Chemical Reaction, American Journal of Computational and Applied Mathematics, 4(4): 141-153, (2014).
[23] Nabil T. M. Eldabe, Elsayed M. A. Elbashbeshy, I. K. Youssef and Ahmed M. Sedki, The Effects of Temperature Dependent Viscosity and Viscous Dissipation on MHD Convection Flow From an Isothermal Horizontal Circular in Presence of Stress Work and Heat Generation, European Scientific Journal, 10(36), (2014).
[24] I. K. Youssef and A. M. Shukur, Precondition for discretized fractional boundary value problem, Pure and Applied Mathematics Journal 3 (1), 1-6, (2014).
[25] I. K. Youssef and Sh. A. Meligy, Boundary Value problems on triangular domains and MKSOR methods, Applied and Computational Mathematics 3 (3), 90-99, (2014).
[26] I. K. Youssef and A. M. Shukur, The line method combined with spectral chebyshev for space-time fractional diffusion equation, Applied and Computational Mathematics 3 (6), 330-336, (2014).
[27] I. K. Youssef and M. M. Faried, On the Accelerated Overrelaxation Method, Pure and Applied Mathematics Journal 4 (1), 26-31, (2015).
[28] Hassan N. Ismail, I. K. Youssef, Tamer M. Rageh, New approach for Taylor and Padè approximations, International Journal of Advances in Applied Mathematics and Mechanics, 2 (3), 78-86, (2015).
[29] N. H. Sweilm, A. M. Nagy, I. K. Youssef & Mahmoud M. Mokhtar, New Spectral Second Kind Chebyshev Wavelets Scheme for Solving Systems of Integro-Differential Equations, International Journal of Applied and Computational Mathematics, Accepted (2016).
[30] N. H. Sweilm, A. M. Nagy, I. K. Youssef & Mahmoud M. Mokhtar, On the Numerical Treatment a Coupled Non-linear System of Fractional Differential Equations, Journal of Theoretical and computational Nanoscience, Accepted (2016).
[31] I. K. Youssef,Salwa M. Ali, M. Y. Hamada, On the Line Successive Overrelaxation Method, Applied and Computational Mathematics 5 (3), 103-106, (2016).
[32] I. K. Youssef,Salwa M. Ali, M. A. Naser, The 3-Block KSOR Method for Full Rank Rectangular Systems, Pure and Applied Mathematics Journal 5 (4), 103-107, (2016).
[33] I. K. Youssef,A. R. Ali, Memory Effects in Diffusion Like Equation Via Haar Wavelet, , Pure and Applied Mathematics Journal 5 (4), 130-140, (2016).
[34]I. K. Youssef, A. R. Ali, Memory Effects Due to Fractional Time Derivative and Integral Space in Diffusion Like Equation Via Haar Wavelets, Applied and Computational Mathematics 5 (4), 177-185, (2016).
[35] Elsayed M. A. Elbashbeshy, Nabil T. M. Eldabe, I. K. Youssef and Ahmed M. Sedki, Effects of Preasure Stress work and Thermal radiation on free convection flow around a sphere embeded in a porous medium with newtonian heating, Thermal Science, (2018).
[36] Hassan N.A. Ismail, I. K. Youssef, Tamer M. Rageh, Numerical Optimization of Fractional Order PID Controller, International Journal of Mathematics and Statistics Invention, 5 (2), 15-20, (2017).
[37] I. K. Youssefand M. H. El-Dewik, Haar Wavelet Solution of Poisson’s Equation and Their Block Structures, American Journal of Mathematics and Computer Modeling, Vol. 2 pp: 88-94, 2017.
[38]I. K. Youssefand M. H. El-Dewik, Solving Poisson’s Equation with fractional order using Haar wavelet, Applied Mathematics and Nonlinear Sciences, Vol. 2 pp: 271-284, 2017.
[39] Hassan N.A. Ismail, I. K. Youssef, Tamer M. Rageh, Numerical Treatment for Solving Fractional Riccati Differential Equation using VIM-Restrictive Pade, Journal of Scientific and Engineering Research, 4 (10): 276-283, 2017.
[40] I. K. Youssef and R. A. Ibrahim, On the Performance of Haar Wavelet Approach for Boundary Value Problems and Systems of Fredholm Integral Equations, Mathematics and Computer Science, 2(4):39-46, 2017.
[41] Hassan N.A. Ismail, I. K. Youssef, Tamer M. Rageh, Modification on Adomian Decomposition Method for Solving Fractional Riccati Differential Equation, IARJSET, Vol. 4 (12), 2017.
[42] I. K. Youssef and R. A. Ibrahim, Second Order Iterative Techniques for Boundary Value Problems and Fredholm Integral Equations, Computational and Applied Mathematics Journal (AASCIT), 3(3):13-21, 2017.
[43] I.K. Youssef and H. S. Mansour, On the Role of Taylor Expansion with Exponential Nonlinearity in BVP, WJRR, 6 (4):6-8, 2018.
[44] I. K. Youssef and H. S. Mansour, Nonlocal Two Point Dirichlet Boundary Value Problems, JFCA, to appear
[45] Hewayda M. S. Lotfy, Azza A. Taha and I. K. Youssef, Fuzzy Linear Systems via Boundary Value Problem, Soft Computing, 2018.
[1] H. N. Ismail, I. K. Youssef and E. El-Shobaky, Observations on Divided Differences via Leibenitz Rule, the 14th International Conference for Statistics, Computer Science; Scientific and Social Applications, Cairo, March 1989.
[2] I. K. Youssef, F. Ebersoldt, E. El-Shobaky, H. N. Ismail and M. Elmoattassem, Numerical Model for Sediment Transport, the 22nd International Conference for Statistics, Computer Science; Scientific and Social Applications, Cairo, May 3-10, 1997.
[3] I. K. Youssef, A. E. Abu-Sabh and B. I. Bayoumi, Finite Element Treatment for the otolith Membrane Distortion, Proceedings of the 1th international Conference on Engineering Mathematics and Physics(EMP) pp51- 62 , Cairo –Egypt . May (14-16) 2002.
[4] I. K. Youssef, A. E. Abu-Sabh and B. I. Bayoumi, Isoparametric rectangular finite element treatment for the otolith membrain distortion, Egyptian mathematical Soccity, Cairo 28-31 Dec. 2002.
[5] Elsayed M. E., Salah M. Elsayed, I. K. Youssef, Ahmed M. M. Khodier, Restrictive Chebyshev rational approximation and applications to heat-conduction problems, Applied Mathematics and Computation vol 136, pp 395-403, 2003.
[6] B. I. Bayoumi, A. A. El-Sawy, N. L. Baseley, I. K. Youssef, A. M. Widyan, "Determining the efficient solution for bicriteria progrmming problems with random variables in both the objective functions and constraints", J. of KSIAM, Vol. 9, no. 1, pp 99-110, 2005.
[7] B. I. Bayoumi, A. A. El-Sawy, N. L. Baseley, I. K. Youssef, A. M. Widyan, "Decomposition the parametric space in stochastic bicriteria progrmming problem", Sci. Bull., Faculty of Engineering, Ain Shams University, Vol. 46, 2005.
[8] Abdallah A. Alkheraiji, A. A. El-Sawy, I. K. Youssef, Somia A. Asklany, A Mathematical study for environmental effects of some air pollutants in Al-Qassim region, Meteorological Research Bulletin, ISSN 1687-1014, Vol. 20 pp 107-118 2005.
[9] Khamis S. M., I. K. Youssef, El-Dewik M. H., and B. I. Bayoumi, An algorithmic aspect of finite difference treatment for PDEs including the mixed derivative term with high accuracy on curved domains the 40th Annual Conference on Statistics, Computer Sciences and Operation research 3-6 Dec. 2005.
[10] I. K. Youssef, H. A. El-Arabawy, Picard iteration algorithm combined with Gauss-Seidel technique for initial value problems, Applied Mathematics and Computation vol. 190, pp 345-355, 2007.
[11] B. I. Bayoumi, A. A. El-Sawy, N. L. Baseley, I. K. Youssef, A. M. Widyan, " An Efficient Approach for Treating astochastic Fuzzy Multicriterion progrmming problem", J. Egypt Math. Soc. Vol. 16(1) pp 109-118, 2008.
[12] I. K. Youssef," On Strongly Coupled Linear Elliptic Systems with application to Otolith Membrain Distortion, J. of Mathematics and Statistics 4(4):237-245, 2008.
[13] H. A. El-Arabawy, I. K. Youssef, A symbolic algorithm for solving linear Two-point boundary value problems By modified Picard technique, Mathematical and Computer Modelling, Vol 49, pp 344-351 2009
[14] Khamis S. M., I. K. Youssef, El-Dewik M. H., and B. I. Bayoumi, A Computational Finite Difference treatment for PDEs including the mixed derivative term with high accuracy on curved domains, J. Egypt Math. Soc.,Vol. 17(1) 2009.
[15] Somia A. Asklany, khaled Elhelow, I. K. Youssef and M. Abd-El wahab, Rinfall events prediction using rule-based inference system, Atomosperic Reasersh, Vol. 101, P 228-236, 2011
[16] I. K. Youssef, Montaser S. Ali, M. A. Ahmed, E. El-Shobaki, Picard Fixed iteration Combined with Integrating Factor Approach, Egeptiation Journal of Pure and Applied Science, 071 – 078, 2011.
[17] I. K. Youssef, On the SOR method, J. of Mathematics and Statistics 8(2):174-182, 2012.
[18] I. K. Youssef and A.I. Alzaki, Minimization of 𝑙2 – norm of the KSOR Operators, J. of Mathematics and Statistics 8(4), 2012.
[19] I. K. Youssef and A.A. Taha, On the modified Successive Overrelaxation method, Applied Mathematics and Computations, 219, 4601-4613,(2013).
[20] I. K. Youssef and R. A. Ibrahim, Boundary Value Problems, Fredholm Integral equations, SOR and KSOR methods, Life Science Journal, 10(2), 4601-4613, (2013).
[21] I. K. Youssef and A. M. Shukur, Modified Variation Iteration method for fraction space-time partial differential heat and wave equations, International Journal of Advanced Research, Vol. 2 (2), 1000- 1013, (2013).
[22] Nabil T. M. Eldabe, Ahmed M. Sedki and I. K. Youssef, Numerical Solution for Boundary Layer Fluid Flow with Mass Transfer over a Moving Permeable Flat Plate Embeded in Porous Medium with Variable Wall Concentration in Presence of Chemical Reaction, American Journal of Computational and Applied Mathematics, 4(4): 141-153, (2014).
[23] Nabil T. M. Eldabe, Elsayed M. A. Elbashbeshy, I. K. Youssef and Ahmed M. Sedki, The Effects of Temperature Dependent Viscosity and Viscous Dissipation on MHD Convection Flow From an Isothermal Horizontal Circular in Presence of Stress Work and Heat Generation, European Scientific Journal, 10(36), (2014).
[24] I. K. Youssef and A. M. Shukur, Precondition for discretized fractional boundary value problem, Pure and Applied Mathematics Journal 3 (1), 1-6, (2014).
[25] I. K. Youssef and Sh. A. Meligy, Boundary Value problems on triangular domains and MKSOR methods, Applied and Computational Mathematics 3 (3), 90-99, (2014).
[26] I. K. Youssef and A. M. Shukur, The line method combined with spectral chebyshev for space-time fractional diffusion equation, Applied and Computational Mathematics 3 (6), 330-336, (2014).
[27] I. K. Youssef and M. M. Faried, On the Accelerated Overrelaxation Method, Pure and Applied Mathematics Journal 4 (1), 26-31, (2015).
[28] Hassan N. Ismail, I. K. Youssef, Tamer M. Rageh, New approach for Taylor and Padè approximations, International Journal of Advances in Applied Mathematics and Mechanics, 2 (3), 78-86, (2015).
[29] N. H. Sweilm, A. M. Nagy, I. K. Youssef & Mahmoud M. Mokhtar, New Spectral Second Kind Chebyshev Wavelets Scheme for Solving Systems of Integro-Differential Equations, International Journal of Applied and Computational Mathematics, Accepted (2016).
[30] N. H. Sweilm, A. M. Nagy, I. K. Youssef & Mahmoud M. Mokhtar, On the Numerical Treatment a Coupled Non-linear System of Fractional Differential Equations, Journal of Theoretical and computational Nanoscience, Accepted (2016).
[31] I. K. Youssef,Salwa M. Ali, M. Y. Hamada, On the Line Successive Overrelaxation Method, Applied and Computational Mathematics 5 (3), 103-106, (2016).
[32] I. K. Youssef,Salwa M. Ali, M. A. Naser, The 3-Block KSOR Method for Full Rank Rectangular Systems, Pure and Applied Mathematics Journal 5 (4), 103-107, (2016).
[33] I. K. Youssef,A. R. Ali, Memory Effects in Diffusion Like Equation Via Haar Wavelet, , Pure and Applied Mathematics Journal 5 (4), 130-140, (2016).
[34]I. K. Youssef, A. R. Ali, Memory Effects Due to Fractional Time Derivative and Integral Space in Diffusion Like Equation Via Haar Wavelets, Applied and Computational Mathematics 5 (4), 177-185, (2016).
[35] Elsayed M. A. Elbashbeshy, Nabil T. M. Eldabe, I. K. Youssef and Ahmed M. Sedki, Effects of Preasure Stress work and Thermal radiation on free convection flow around a sphere embeded in a porous medium with newtonian heating, Thermal Science, (2018).
[36] Hassan N.A. Ismail, I. K. Youssef, Tamer M. Rageh, Numerical Optimization of Fractional Order PID Controller, International Journal of Mathematics and Statistics Invention, 5 (2), 15-20, (2017).
[37] I. K. Youssefand M. H. El-Dewik, Haar Wavelet Solution of Poisson’s Equation and Their Block Structures, American Journal of Mathematics and Computer Modeling, Vol. 2 pp: 88-94, 2017.
[38]I. K. Youssefand M. H. El-Dewik, Solving Poisson’s Equation with fractional order using Haar wavelet, Applied Mathematics and Nonlinear Sciences, Vol. 2 pp: 271-284, 2017.
[39] Hassan N.A. Ismail, I. K. Youssef, Tamer M. Rageh, Numerical Treatment for Solving Fractional Riccati Differential Equation using VIM-Restrictive Pade, Journal of Scientific and Engineering Research, 4 (10): 276-283, 2017.
[40] I. K. Youssef and R. A. Ibrahim, On the Performance of Haar Wavelet Approach for Boundary Value Problems and Systems of Fredholm Integral Equations, Mathematics and Computer Science, 2(4):39-46, 2017.
[41] Hassan N.A. Ismail, I. K. Youssef, Tamer M. Rageh, Modification on Adomian Decomposition Method for Solving Fractional Riccati Differential Equation, IARJSET, Vol. 4 (12), 2017.
[42] I. K. Youssef and R. A. Ibrahim, Second Order Iterative Techniques for Boundary Value Problems and Fredholm Integral Equations, Computational and Applied Mathematics Journal (AASCIT), 3(3):13-21, 2017.
[43] I.K. Youssef and H. S. Mansour, On the Role of Taylor Expansion with Exponential Nonlinearity in BVP, WJRR, 6 (4):6-8, 2018.
[44] Hewayda M. S. Lotfy, Azza A. Taha and I. K. Youssef, Fuzzy Linear Systems via Boundary Value Problem, Soft Computing, 2019.
[45] I. K. Youssef and M. H. El Dewaik , Solving Poisson's Equation of Fractional Order Using ADI Method, 4th CIC's MULTIDISCIPLINARY INTERNATIONAL CONFERENCE, 2019