@misc{willumeit_seminar_zur_2003, 
author={Willumeit, R.},
title={Seminar zur strukturellen Biochemie},
year={2003},
howpublished = {lecture: Universitaet Hamburg, FB Chemie; WS 2003-2004},
note = {Online available at: \url{} (DOI). Willumeit, R.: Seminar zur strukturellen Biochemie. Universitaet Hamburg, FB Chemie, 2003.}}