@misc{willumeit_implant_surface_2003, 
author={Willumeit, R.,Schroeder, J.,Feyerabend, F.,Kamusewitz, H.,Schossig, M.,Clemens, H.},
title={Implant Surface Modification using Biological Multi-layer Systems},
year={2003},
howpublished = {conference lecture: Aachen (D); 19.-21.02.2003},
note = {Online available at: \url{} (DOI). Willumeit, R.; Schroeder, J.; Feyerabend, F.; Kamusewitz, H.; Schossig, M.; Clemens, H.: Implant Surface Modification using Biological Multi-layer Systems. 16th Aachen Colloquium on Biomaterials,  BIOMAT 2003. Aachen (D), 2003.}}