@book{25190,
	author = {Siegmund, Oswald, ed.},
	title = {EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II},
	publisher = {SPIE},
	year = {1991},
	series = {Proceedings of SPIE; V. 1549},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1549}
}