@article {van:1997:0038-6308:201,
	author = "van Leeuwen F.",
	title = "The Hipparcos Mission",
	journal = "Space Science Reviews",
	volume = "81",
	number = "3/4",
	year = "1997",
	pages = "201-409",
	url = "http://www.ingentaconnect.com/content/klu/spac/1997/00000081/F0020003/00153672"
}