@book{33456,
	author = {Carapezza, Edward, ed.},
	title = {Unattended Ground Sensor Technologies and Applications IV},
	publisher = {SPIE},
	year = {2002},
	series = {Proceedings of SPIE; V. 4743},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4743}
}