@book{25507,
	author = {Prosnitz, Donald, ed.},
	title = {Free-Electron Lasers and Applications},
	publisher = {SPIE},
	year = {1990},
	series = {Proceedings of SPIE; V. 1227},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1227}
}