1. Bērzinš, B., 1978. Ekologisk valens. Zookomponenter, sub strat och lokaler. Internal report, Limnol. inst. Lund. ISSN 0348-0798.86 pp. (Swedish only).
2. Bērzinš, B. & Bertilsson, J., in press. On limnic micro-crustaceans and trophic degree. Hydrobiologia.
3. Bērzinš, B. & Pejler, B., 1987. Rotifer occurrence in relation to pH. Hydrobiologia 147: 107–116.
4. Brooks, J. L., 1969. Eutrophication and changes in the composition of the zooplankton. In: Eutrophication-causes, consequences, correctives. Washington, Pp. 236–255.
5. Eie, J. A., 1974. A comparative study of the crustacean communities in forest and mountain localities in the Vassfaret area (southern Norway). Norweg. J. Zool. 22: 177–205.