1. Fine structural study of Sarcocystis sp. from Egyptian Camels (Camelus dromedarius);Entzeroth;Acta vet. Acad. Sci. hung.,1981
2. Advances in the biology of sporozoa;Frenkel;Z. Parasitenk.,1974
3. Hammondia hammondi gen. nov., sp. nov., from domestic cats, a new Coccidian related to Toxoplasma and Sarcocystis;Frenkel;Z. Parasitenk.,1975
4. Spontaneous Frenkelia infection in a laboratory-reared rat;Hayden;Vet. Pathol.,1976