@misc{paul_membranes_for_1999, 
author={Paul, D.},
title={Membranes for Medicine},
year={1999},
howpublished = {conference lecture: Singapur (SGP); 23.03.1999},
note = {Online available at: \url{} (DOI). Paul, D.: Membranes for Medicine. National University of Singapur. Singapur (SGP), 1999.}}