by Efendiev, Rakib F, Orudzhev, Hamzaga D, El-Raheem, Zaki FA
Published in Boundary value problems (01.12.2016)

by El-Raheem, Zaki FA, Salama, Farouk A
Published in Boundary value problems (03.04.2015)

by El-Raheem, Zaki FA, Nasser, AH
Published in Boundary value problems (06.05.2014)

by El-Raheem, Zaki FA, Nasser, AH
Published in Boundary value problems (23.11.2011)

by El-Raheem, Zaki F. A., Nasser, A. H.
Published in Abstract and Applied Analysis (01.01.2012)