@book{33016,
	author = {Ryskin, Alexander, ed.},
	title = {Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions},
	publisher = {SPIE},
	year = {1996},
	series = {Proceedings of SPIE; V. 2706},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2706}
}