@book{33510,
	author = {Karlsen, Robert, ed.},
	title = {Unmanned Systems Technology XX},
	publisher = {SPIE},
	year = {2018},
	series = {Proceedings of SPIE; V. 10640},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10640}
}