{\rtf1\ansi\deff0\deftab360 {\fonttbl {\f0\fswiss\fcharset0 Arial} {\f1\froman\fcharset0 Times New Roman} {\f2\fswiss\fcharset0 Verdana} {\f3\froman\fcharset2 Symbol} } {\colortbl; \red0\green0\blue0; } {\info {\author Biblio 7.x}{\operator }{\title Biblio RTF Export}} \f1\fs24 \paperw11907\paperh16839 \pgncont\pgndec\pgnstarts1\pgnrestart Scholz, T, J\'e4hne, B, Suhr, H, Wehnert, G, Gei\'dfler, P and Schneider, K (1994). A new depth from focus technique for in situ determination of cell concentration in bioreactors. Proc. 16. DAGM-Symposium Mustererkennung. 145--150\par \par }