@conference {611,
	title = {Preoperative Planning and Simulation of Pelvic and Hip Endoprostheses using Virtual Three-Dimensional Models},
	booktitle = {4th International Symposium on Computer Assisted Orthopaedic Surgery, CAOS 99},
	year = {1999},
	address = {Davos},
	author = {Jan Ehrhardt and Heinz Handels and Peters, P and Pl{\"o}tz, W and Siegfried J. P{\"o}ppl}
}
