@book{29088,
	author = {Winston, Roland, ed.},
	title = {Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI},
	publisher = {SPIE},
	year = {2009},
	series = {Proceedings of SPIE; V. 7423},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7423}
}