@book{28140,
	author = {Boardman, Allan, ed.},
	title = {Metamaterials VII},
	publisher = {SPIE},
	year = {2012},
	series = {Proceedings of SPIE; V. 8423},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8423}
}