@misc{bluemke_abwasserreinigung__1998, 
author={Bluemke, W.},
title={Abwasserreinigung},
year={1998},
howpublished = {lecture: Universitaet Lueneburg; WS 1998-1999},
note = {Online available at: \url{} (DOI). Bluemke, W.: Abwasserreinigung. Universitaet Lueneburg, 1998.}}