@book{22596,
	author = {Kroon, Dirk-Jan, ed.},
	title = {1980 European Conf on Optical Systems and Applications},
	publisher = {SPIE},
	year = {1981},
	series = {Proceedings of SPIE; V. 0236},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0236}
}