1. Ziesseniss, E. Symbiose-spezifische Synthese und Excretion von Maltose durch Chlorella spec. aus Paramecium bursaria. Dissertation, Georg-August-Universität zu Göttingen, F.R.G., 1982.
2. Autotrophic eukaryotic freshwater symbionts;Reißer,1984
3. Wolf, L., Physiological Parameters of Chlorella 241.80. ESA Technical Report, XA 93/159/LW. European Space Agency, Noordwijk, The Netherlands, 1993.
4. A tubular bioreactor for photosynthetic production of biomass from carbon dioxide: Design and performance;Pirt;Journal of Chemical Technology and Biotechnology,1983
5. Oguchi, M, Nitta, K., Otsubo, K., Shimada, A., Miyazaki, K., Koyano, T., Miki, K., Application of tubular photo-bioreactor system to culture spirulina for gas exchange and food production in CELSS. Proceedings 40th Congress of the International Astronautical Federation, paper no. IAF/IAA-89--577, 1989.