PT Unknown AU Holzapfel, H Schaaf, T Ekenel, HK Shaa, C Waibel, A TI A Robot Learns to Know People - First Contacts of a Robot SE 29th Annual German Conference on AI, KI 2006, Bremen, Germany, June 14-17, 2006. Proceedings PY 2006 BP 302 EP 316 VL 4314 LA english ER