@book{30110,
	author = {Andreev, Vladimir, ed.},
	title = {Optical Technologies for Telecommunications 2019},
	publisher = {SPIE},
	year = {2020},
	series = {Proceedings of SPIE; V. 11516},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11516}
}