@book{33105,
	author = {McDowall, Ian, ed.},
	title = {The Engineering Reality of Virtual Reality 2009},
	publisher = {SPIE},
	year = {2009},
	series = {Proceedings of SPIE; V. 7238},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7238}
}