1. Evidence for non-assimilation of Chlorella by the African freshwater snail Bulinus (Physopsis) globosus;van Aardt;S. African J. Sci.,1981
2. The cell content and secretion of water-soluble vitamins by several freshwater algae;Aaronson;Arch. Microbiol.,1977
3. Field studies on the competition between purple and green sulfur bacteria for available light (Lake Siso, Spain);Abella;Developments Hydrobiol.,1980
4. über die Milieufaktoren in einigen südschwedischen Seen;Åberg;Symbol. Bot. Upsalien.,1942
5. The role of turbidity as a constraint on predator-prey interactions in aquatic environments;Abrahams;Behav. Ecol. Sociobiol.,1997