@misc{meissner_extensivation_in_1994, 
author={Meissner, R., Rupp, H.},
title={Extensivation in agriculture and the effects on the nitrogen wash out with seepage water},
year={1994},
howpublished = {conference lecture: Zuerich (CH);},
note = {Meissner, R.; Rupp, H.: Extensivation in agriculture and the effects on the nitrogen wash out with seepage water. Third European Conference on Ecotoxicology. Zuerich (CH), 1994.}}