@article {Gadsden:2 January 1998:1364-6826:1163,
	author = "Gadsden M.",
	title = "The North-West Europe data on noctilucent clouds: a survey",
	journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
	volume = "60",
	year = "2 January 1998",
	abstract = "",
	pages = "1163-1174(12)",
	url = "http://www.ingentaconnect.com/content/els/13646826/1998/00000060/00000012/art00072"
	doi = "doi:10.1016/S1364-6826(98)00072-8"
}