On the Product of Two Confluent Hypergeometric Functions. F.M. Ragab — 1957 Monatshefte für Mathematik
Expansions of Kampé de Feriet's Double Hypergeometric Function of Higher Order. F.M. Ragab — 1963 Journal für die reine und angewandte Mathematik
Integration of E-Functions and Related Series. F.M. Ragab; M.A. Simary — 1966 Monatshefte für Mathematik
E-Function Series whose Sums are Constants. F.M. Ragab; T.M. MacRobert — 1962 Mathematische Zeitschrift