@article {Hassall2001,
	title = {Foraging behaviour of brent geese, Branta b. bernicla , on grasslands: effects of sward length and nitrogen content},
	journal = {Oecologia},
	volume = {127},
	number = {1},
	year = {2001},
	month = {mar},
	pages = {97{\textendash}104},
	keywords = {digestibility, energy intake rates, feeding strategies, grazing wildfowl, nitrogen content},
	isbn = {0044200005},
	issn = {0029-8549},
	doi = {10.1007/s004420000563},
	url = {http://www.springerlink.com/openurl.asp?genre=article\&id=doi:10.1007/s004420000563},
	author = {Hassall, Mark and Helden, Alvin and Riddington, Roger}
}
