@article {35572,
	title = {Predicting stable and cyclic populations of Clethrionomys spp. },
	volume = {52},
	year = {1987},
	pages = {178-185},
	publisher = {Oikos},
	url = {http://www.jstor.org/stable/3682501},
	author = {Bondrup-Nielsen, S{\O}ren and Ims, R. A.}
}
