@article {43545,
	title = {The coarse-root system of mature Populus tremuloides in declining stands in Alberta, Canada},
	volume = {12},
	year = {2001},
	pages = {355-360},
	publisher = {Journal of Vegetation Science},
	url = {http://www.jstor.org/stable/3236849},
	author = {DesRochers, Annie and Lieffers, Victor J.}
}
