1. Detailed Studies on the Hermaphroditic Reproductive System of the Desert Snail Eremina ehrenbergi Roth, 1839 to Determine the Male Tract and Its Role in the Formation of the Spermatophores (Gastropoda - Stylommatophora);Abd El-Kerim,1988
2. The formation of primary envelope during oocyte differentiation in teleosts;Anderson;J. Cell Biol.,1967
3. Oocyte-follicle cell differentiation into species of amphineurans (Mollusca), Mopalia mucosa and Chaetopleura apiculata;Anderson;J. Morph.,1969
4. Spermatophores of the snail Neritina reclivata;Andrews;J. Morphol.,1936
5. Die atypische Spermatogenese von Janthina (Prosobranchia, Ptenoglossa);Ankel;Cell Tissue Res.,1930