@book{31565,
	author = {Honkanen, Seppo, ed.},
	title = {Rare-Earth-Doped Devices},
	publisher = {SPIE},
	year = {1997},
	series = {Proceedings of SPIE; V. 2996},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2996}
}