@article {41645,
	title = {Population size and differential population growth of introduced Greater Canada Geese Branta canadensis and re-established Greylag Geese Anser anser across habitats in Great Britain in the year 2000},
	journal = {Bird Study},
	volume = {54},
	year = {2007},
	pages = {343{\textendash}352},
	author = {Austin, Graham E and Rehfisch, Mark M and Allan, John R and Holloway, Steve J}
}
