1. Facultative parasitism in Protozoa and its possible evolutionary significance;Corliss;Parasitology,1962
2. Über eine neue Amöbe auf Süsswasser-Polypen (Hydra oligactis Pall.);Entz;Arch. Protistenk.,1912
3. On Hydramoeba hydroxena (Entz) discovered in Japan;Itô;Sci. Rep. Tohoku Univ., 4th Ser. (Biol.),1949
4. Further notes on Hydramoeba hydroxena (Entz) from Japan;Itô;Mem. Ehime Univ., Sec. II (Sci.),1950
5. Chemical nature of the cyst wall in certain human intestinal Protozoa;Kofoid;Proc. Soc. Exptl. Biol. Med.,1931