@book{33830,
	author = {Kaplyanskii, Alexander, ed.},
	title = {XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions},
	publisher = {SPIE},
	year = {2002},
	series = {Proceedings of SPIE; V. 4766},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4766}
}