@article {Kampe-persson2010,
	title = {Naturalised geese in Europe},
	journal = {Ornis Svecica},
	volume = {20},
	number = {2008},
	year = {2010},
	pages = {155{\textendash}173},
	url = {http://www.jenskjeld.info/artikler/Kampe-Persson\_2010.pdf},
	author = {Kampe-persson, Hakon}
}
