@misc{willumeit_biochemische_analytik_2004, 
author={Willumeit, R.},
title={Biochemische Analytik},
year={2004},
howpublished = {lecture: Universitaet Hamburg, FB Chemie; 05.04.-05.07.2004},
note = {Online available at: \url{} (DOI). Willumeit, R.: Biochemische Analytik. Universitaet Hamburg, FB Chemie, 2004.}}