@article {Patton1981,
	title = {The effect of grazing in winter by wild geese on improved grassland in west Scotland},
	journal = {Journal of Applied Ecology},
	volume = {18},
	number = {1},
	year = {1981},
	pages = {311{\textendash}325},
	publisher = {British Ecological Society},
	url = {http://www.jstor.org/stable/2402498},
	author = {Patton, DLH and Frame, J.}
}
