@inbook {letzepis2012hybridcommunications,
	title = {Hybrid Free-Space Optical and Radio-Fequency Wireless Communications},
	booktitle = {Advanced Optical Wireless Communication Systems},
	year = {2012},
	pages = {273 - 302},
	publisher = {Cambridge University Press},
	organization = {Cambridge University Press},
	isbn = {9780521197878},
	url = {http://www.cambridge.org/gb/knowledge/isbn/item6623080/?site_locale=en_GB},
	author = {Nick Letzepis and Guill{\'e}n i F{\`a}bregas, Albert}
}
