1. Allen, M. B.: List of cultures maintained by the Laboratory of Comparative Biology, Kaiser Foundation Research Institute (1963) (hektographiert).
2. (Anonym): List of strains. Culture collection of algae and protozoa. University of Cambridge. Cambridge: The Botany School 1966.
3. Avilov, I. A.: Utilisation of different carbon sources by algae of the genus Chlorella in the dark. Vestn. Leningrad. Univ., Nr. 15, Ser. Biol., H. 3, 62?68 (1963).
4. Beyerinck, M. W.: Culturversuche mit Zoochlorellen, Lichenengonidien und anderen niederen Algen. Bot. Z. 48, 725?785 (1890).
5. Butcher, R. W.: Contributions to our knowledge of the smaller marine algae. J. mar. biol. Assoc. U.K. 31, 175?190 (1952).