Dr. Christian Ohlendorf
55e: 15-17. http://www.eawag.ch/publications/eawagnews/www_en55/en55e_screen/en55e_sturm_s.pdf Hausmann S., Van Leeuwen J., Lotter A.F., Ohlendorf C. and Sturm M. (1999). Étude à haute résolution des derniers [...] study. Hydrobiologia 614: 159-170. http://dx.doi.org/10.1007/s10750-008-9504-z . Ohlendorf C. and Sturm M. (2008). A modified method for biogenic silica determination. Journal of Paleolimnology 39: 137-142 [...] 1007/s10933-007-9100-7 . Bigler C., von Gunten L., Lotter A.F., Hausmann S., Blass A., Ohlendorf C. and Sturm M. (2007). Quantifying human-induced eutrophication in Swiss mountain lakes since AD 1800 using diatoms