Steffen Patzwahl Thomas Nacke Dieter Frense Dieter Beckmann Klaus-Dietrich Kramer Tobias Tautz Gerd-Rainer Vollmer Microcontroller-Based Fuzzy System to Optimize the Anaerobic Digestion in Biogas Reactors. 2-10 2001 conf/fuzzy/2001 Fuzzy Days http://link.springer.de/link/service/series/0558/bibs/2206/22060002.htm db/conf/fuzzy/fuzzy2001.html#PatzwahlNFBKTV01