1. Protothecal olecranon bursitis;Ahbel;J Bone Joint Surg [Am],1980
2. Nature of the growth factor for the colorless alga Prototheca zopfii;Anderson;J Gen Physiol,1945
3. Sources of Prototheca spp in a dairy herd environment;Anderson;J Am Vet Med Assoc,1988
4. The systematics of the genus Prototheca with a description of a new species P. filamenta;Arnold;Mycologia,1972
5. A new species of Prototheca and a variety of the same isolated from the human intestine;Ashford;Archiv für Protistenkunde,1930