@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);},
note = {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.}}