A Jacobi-Jacobi dual-Petrov-Galerkin method for third- and fifth-order differential equations. - Eid H. Doha; Ali H. Bhrawy; R. M. Hafez (Math. Comput. Model., 2011)

New Numerical Approach for Fractional Variational Problems Using Shifted Legendre Orthonormal Polynomials. - Samer S. Ezz-Eldien; R. M. Hafez; Ali H. Bhrawy; Dumitru Baleanu; Ahmed A. El-Kalaawy (J. Optim. Theory Appl., 2017)

Shifted Jacobi spectral-Galerkin method for solving hyperbolic partial differential equations. - Eid H. Doha; R. M. Hafez; Youssri Hassan Youssri (Comput. Math. Appl., 2019)

High-order continuous Galerkin methods for multi-dimensional advection-reaction-diffusion problems. - Ramy M. Hafez; Mahmoud A. Zaky (Eng. Comput., 2020)

A novel spectral Galerkin/Petrov-Galerkin algorithm for the multi-dimensional space-time fractional advection-diffusion-reaction equations with nonsmooth solutions. - Ramy M. Hafez; Mahmoud A. Zaky; Ahmed S. Hendy (Math. Comput. Simul., 2021)

Correction to: Fractional Jacobi Galerkin spectral schemes for multi-dimensional time fractional advection-difusion-reaction equations. - Ramy M. Hafez; Magda Hammad; Eid H. Doha (Eng. Comput., 2022)

Computational and theoretical aspects of Romanovski-Bessel polynomials and their applications in spectral approximations. - Mahmoud A. Zaky; Howayda Abo-Gabal; Ramy M. Hafez; Eid H. Doha (Numer. Algorithms, 2022)

A Galerkin algorithm leveraging Bernoulli polynomials for accurate solutions of time-fractional diffusion-wave equations. - R. M. Hafez; M. A. Abdelkawy; A. Biswas; H. M. Ahmed (J. Comput. Sci., 2025)