@book{24201,
	author = {Opower, Hans, ed.},
	title = {CO2 Lasers and Applications II},
	publisher = {SPIE},
	year = {1990},
	series = {Proceedings of SPIE; V. 1276},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1276}
}