@article {25781,
	title = {Fluctuations in numbers of the muskrat (Ondatra zibethica) in Canada},
	volume = {11},
	year = {1942},
	pages = {96-126},
	publisher = {Journal of Animal Ecology},
	url = {http://www.jstor.org/stable/1303},
	author = {Elton, C. and Nicholson, M.}
}
