@inproceedings{HCI-EI-1999-SteffanKB,
	author        = "Roland Steffan and Torsten Kuhlen and Frank Broicher",
	booktitle     = "{Proceedings of the Eighth International Conference on Human-Computer Interaction. Volume 1: Ergonomics and User Interfaces}",
	isbn          = "0-8058-3391-9",
	pages         = "461--465",
	publisher     = "{Lawrence Erlbaum}",
	title         = "{Design of Multimodal Feedback Mechanisms for Interactive 3D Object Manipulation}",
	year          = 1999,
}