1. Andersen, J. M. & Jacobsen, O. S., 1979. Production and decomposition of organic matter in eutrophic Frederiksborg Slotss�, Denmark. Arch. Hydrobiol. 85: 511?542.
2. Blaauboer, Marianne C. L, Keulen, R. van, Cappenberg, Th. E., 1982. Extracellular release of photosynthetic products by freshwater phytoplankton populations, with special reference to the algal species involved. Freshwat. Biol. (in press.)
3. Bloesch, J. & Burns, N. M., 1980. A critical review of sedimentation trap technique. Schweiz. Z. Hydrol. 42: 15?55.
4. Blomqvist, S. & H?kanson, L., 1981. A review on sediment traps in aquatic environments. Arch. Hydrobiol. 91: 101?132.
5. Cappenberg, Th. E., 1972. Ecological observations on heterotrophic, methane oxidizing and sulfate reducing bacteria in a pond. Hydrobiologia 40: 471?485.