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H.Suhr, G.Wehnert, K.Schneider, C.Bittner, T.Scholz, P.Geissler, B.Jähne, T.Scheper: In Situ Microscopy for Online Characterization of Cell-Populations in Bioreactors, Including Cell- Concentration Measurements by Depth from Focus. Biotechnol. Bioeng. 47, 106-117 (1995)