@book{21398,
	author = {Launay, Françoise },
	title = {The Astronomer Jules Janssen},
	publisher = {Springer New York},
	year = {2012},
	series = {Astrophysics and Space Science Library},
	address = {New York},
	url = {http://doi.org/10.1007/978-1-4614-0697-6}
}