@inbook{roberts_book2005,
	author = {Dave Roberts and Robin Wolff and Oliver Otto},
	chapter = {The impact of display system and embodiment on closely coupled collaboration between remote users},
	editor = {Ralph Schroeder},
	publisher = {Springer-Verlag, London},
	title = {Avatars at Work and Play: Collaboration and Interaction in Shared Virtual Environments},
	year = {2005}
}