by El-Sabaa, F.M., Amer, T.S., Gad, H.M., Bek, M.A.
Published in Results in physics (01.12.2020)

by El-Sabaa, F.M., Amer, T.S., Sallam, A.A., Abady, I.M.
Published in Alexandria engineering journal (01.02.2022)

by Amer, T.S., El-Sabaa, F.M., Sallam, A.A., Abady, I.M.
Published in Mathematics and computers in simulation (01.08.2023)

by El-Sabaa, F.M., Amer, T.S., Sallam, A.A., Abady, I.M.
Published in Mathematics and computers in simulation (01.08.2022)

by El-Sabaa, F. M.
Published in International journal of theoretical physics (01.10.1995)

by El'-Sabaa, F.M.
Published in Journal of applied mathematics and mechanics (1981)