@book{33889,
	author = {Hoover, Richard, ed.},
	title = {X-Ray Optics, Instruments, and Missions IV},
	publisher = {SPIE},
	year = {2000},
	series = {Proceedings of SPIE; V. 4138},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4138}
}