@misc{heisterkamp_bioassaydirected_chemical_2004, 
author={Heisterkamp, I.,Gandrass, J.,Ruck, W.},
title={Bioassay-Directed Chemical Analysis Utilizing LC-MS: A Tool for Identifying Estrogenic Compounds in Surface Waters?},
year={2004},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Heisterkamp, I.; Gandrass, J.; Ruck, W.: Bioassay-Directed Chemical Analysis Utilizing LC-MS: A Tool for Identifying Estrogenic Compounds in Surface Waters?. Analytical and Bioanalytical Chemistry. 2004. vol. 378, no. 3, 709-715.}}