@inproceedings{petersen_assessment_of_2001, 
author={Petersen, W. and Callies, U.},
title={Assessment of Primary Production by Statistical Analysis of Water-Quality Data},
year={2001},
booktitle = {Jahrestagung der Wasserchemischen Gesellschaft der GDCh},
note = {Petersen, W.; Callies, U.: Assessment of Primary Production by Statistical Analysis of Water-Quality Data. In: Jahrestagung der Wasserchemischen Gesellschaft der GDCh. Bad Wildungen (D), 21.-23.05.2001, 2001.}}