@article {22947,
	title = {Optical properties of cirrus clouds at a mid-latitude EARLINET station-art. no. 67450M},
	year = {2007},
	institution = {Aristotle University of Thessaloniki},
	author = {Giannakaki, E. and V. Amiridis and S. Kazadzis and Balis, Dimitrios}
}
