1. A Treatise on Limnology. Vol. II: Introduction to Lake Biology and Limnoplankton;Hutchinson,1967
2. Note sur le Ceratium hirundinella (O.-F. Müller). Sa variabilité et son mode de reproduction;Blanc;Bull. Soc. Vaud. Sci. Nat.,1882
3. Form variation in Ceratium hirundinella O. F. M.;Pearsall,1929
4. Ceratium hirundinella in Lake Erken: Horizontal distribution and form variation;Dottne-Lindgren;Int. Rev. Gesamten Hydrobiol.,1975