1. Ahlstrom, E. H., 1940. A revision of the Rotatorian genera Brachionus and Platyias with descriptions of one new species and two new varieties. Bull. am. Mus. nat. Hist. 77: 148?184.
2. Ahlstrom, E. H., 1943. A revision of the Rotatorian genus Keratella with descriptions of three new species and five new varieties. Bull. am. Mus. nat. Hist. 80: 411?457.
3. Bateman, L. E. & Davis, C. C., 1980. The Rotifera of Hammock-Hollow formations in a poor (mesotrophic) fen in Newfoundland. Int. Revue ges. Hydrobiol. 65: 127?153.
4. Chengalath, R., 1976. Littoral Rotifera of Ontario ? the genus Lepadella Bory de St. Vincent. Can. J. Zool. 54: 901?907.
5. Chengalath, R., 1977. A list of Rotifera recorded from Canada with Synonyms. Syllogeus 11: 1?30.