@book{22923,
	author = {Roddier, Francois, ed.},
	title = {Active Telescope Systems},
	publisher = {SPIE},
	year = {1989},
	series = {Proceedings of SPIE; V. 1114},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1114}
}