%0 journal article %@ 1618-2642 %A Heisterkamp, I., Gandrass, J., Ruck, W. %D 2004 %J Analytical and Bioanalytical Chemistry %N 3 %P 709-715 %T Bioassay-Directed Chemical Analysis Utilizing LC-MS: A Tool for Identifying Estrogenic Compounds in Surface Waters? %U 3 %X