@book{27122,
	author = {Weichel, Hugo, ed.},
	title = {Laser Beam Propagation and Control},
	publisher = {SPIE},
	year = {1994},
	series = {Proceedings of SPIE; V. 2120},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2120}
}