@misc{willumeit_strukturbiochemie_ii_2004, 
author={Willumeit, R.},
title={Strukturbiochemie II},
year={2004},
howpublished = {lecture: Universitaet Hamburg, FB Chemie; WS 2004-2005},
note = {Online available at: \url{} (DOI). Willumeit, R.: Strukturbiochemie II. Universitaet Hamburg, FB Chemie, 2004.}}