@article {gonzalez2010herschel,
	title = {Herschel observations of water vapour in Markarian 231},
	journal = {Astronomy \& Astrophysics},
	volume = {518},
	year = {2010},
	pages = {L43},
	publisher = {EDP Sciences},
	author = {Gonz{\'a}lez-Alfonso, E and Fischer, J and Isaak, K and Rykala, A and Savini, G and Spaans, M and van der Werf, P and Meijerink, R and Israel, FP and Loenen, AF and others}
}
