4-methylumbelliferyl-beta-N-acetylglucosaminide hydrolysis by a high-affinity enzyme, a putative marker of protozoan bacterivory. Applied and Environmental Microbiology 59: 3091–3101.
. 1993. Enhanced Activity of Alkaline-phosphatases - Phytoplankton Response To Epilimnetic Phosphorus Depletion. Water Science and Technology 28: 15–24.
. 1993. Importance of the River Inflow For the Spring Development of Plankton In Rimov Reservoir (czechoslovakia). Advances In Limnology, Vol 40 - Proceedings of the Second International Conference On Reservoir Limnology and Water Quality 40: 51–56.
. 1993. Microbial algal crustacean interactions in a reservoir under different fishstock. Archiv für Hydrobiologie Beihefte Ergebnisse der Limnologie 40: 209–221.
. 1993. . 1992.
Seasonal extracellular enzyme activities in decomposition of polymeric organic matter in a reservoir. Archiv für Hydrobiologie Beihefte Ergebnisse der Limnologie 37: 33-42.
1992. Effect of periodic illumination on nitrification in the continuous cultivation. Archiv für Hydrobiologie Beihefte Ergebnisse der Limnologie 34: 145–450.
1990.