@book{29086,
	author = {Winston, Roland, ed.},
	title = {Nonimaging Optics and Efficient Illumination Systems V},
	publisher = {SPIE},
	year = {2008},
	series = {Proceedings of SPIE; V. 7059},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7059}
}