Reference

J. Mayer, Martin T. Dokulil, M. Salbrechter, M. Berger, Thomas Posch, G. Pfister, A.K.T. Kirschner, B. Velimirov, Andrea Steitz, et al. (1997): Seasonal successions and trophic relations between phtween phytoplankton, zooplankton, ciliate and bacteria in a hypertrophic shallow lake in Vienna, Austria – Forschungsdienst – 342: 165 - 174.