Paper  bibtex   

@article{kollee_exploring_????,
	title = {Exploring {User} {Interaction} {Techniques} for {Head} {Mounted} {Devices} to {Control} {Content} on {Multiple} {Displays}},
	url = {http://dare.uva.nl/cgi/arno/show.cgi?fid=543091},
	urldate = {2015-01-26TZ},
	author = {Kollee, Barry and Kratz, Supervisors Sven and Nack, Frank}
}