@book{33203,
	author = {Guenther, Karl, ed.},
	title = {Thin Films for Optical Systems},
	publisher = {SPIE},
	year = {1993},
	series = {Proceedings of SPIE; V. 1782},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1782}
}