@book{33506,
	author = {Karlsen, Robert, ed.},
	title = {Unmanned Systems Technology XV},
	publisher = {SPIE},
	year = {2013},
	series = {Proceedings of SPIE; V. 8741},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8741}
}