1. Beauchamp, P. de, 1956. Le d�veloppement de Ploesoma hydsoni (Imhof) et l'origine des feuillets chez les Rotiferes. Bull. Soc. zool. Fr, 81: 374?383.
2. Bogoslovsky, A. S., 1925. Observations on rotifer ecology. Proc. Bolshevsk. biol. stat. 7?8: 101?123 (in Russian).
3. Bogoslovsky, A. S., 1960. Observations on Conochiloides coenobasis Skorikov reproduction and discovery of the new for the heterogenic rotifers females category. Zool. J., 39: 670?677 (in Russian).
4. Bykhovsky, B. E., 1937. Ontogenesis and phylogenetic relationships of parasitic Platyhelminthes. News USSR Acad. Sci., ser. biol. 4: 1353?1383. (in Russian).
5. Developments in Hydrobiology;P. Cl�ment,1980