@misc{willumeit_biological_multilayer_2002, 
author={Willumeit, R.,Kamusewitz, H.,Schossig, M.,Clemens, H.},
title={Biological Multi-layer Systems as Implant Surface Modification},
year={2002},
howpublished = {conference poster: Essen (D); 09.-11.10.2002},
note = {Online available at: \url{} (DOI). Willumeit, R.; Kamusewitz, H.; Schossig, M.; Clemens, H.: Biological Multi-layer Systems as Implant Surface Modification. In: 5th International Essen Symposium on Biomaterials. Essen (D). 2002.}}