@book{29105,
	author = {Winston, Roland, ed.},
	title = {Nonimaging Optics: Maximum-Efficiency Light Transfer II},
	publisher = {SPIE},
	year = {1993},
	series = {Proceedings of SPIE; V. 2016},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2016}
}