@book{22888,
	author = {Gilbreath, G. Charmaine, ed.},
	title = {Active and Passive Signatures II},
	publisher = {SPIE},
	year = {2011},
	series = {Proceedings of SPIE; V. 8040},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8040}
}