@misc{schmidt_biotestgeleitete_chemische_2000, 
author={Schmidt, B.},
title={Biotest-geleitete chemische Analyse von Sedimenten (Dissertation)},
year={2000},
howpublished = {doctoral thesis,GKSS report},
note = {Online available at: \url{} (DOI). Schmidt, B.: Biotest-geleitete chemische Analyse von Sedimenten (Dissertation). Hamburg, FB Chemie, 2000.}}