@misc{meissner_the_influence_1994, 
author={Meissner, R.,Guhr, H.},
title={The influence of administrative measures of laying up and extensivation in agriculture on the improvement of the nitrogen water quality of the river Elbe},
year={1994},
howpublished = {conference paper,conference lecture: Ottawa (CDN); June 19-23, 1994},
note = {Online available at: \url{} (DOI). Meissner, R.; Guhr, H.: The influence of administrative measures of laying up and extensivation in agriculture on the improvement of the nitrogen water quality of the river Elbe. In: Abstracts of the First International Symposium on Ecosystem Health and Medicine: Integrating Science, Policy and Management. Ottawa (CDN). 1994. 70-71.}}