@article {44886,
	title = {Seasonal dynamics and defoliation impact on herbage yield in aspen boreal habitats of Alberta},
	volume = {117},
	year = {2003},
	pages = {196-202},
	publisher = {The Canadian Field-Naturalist},
	author = {Donkor, Noble and Okello, Moses and Hudson, Robert and Bork, Edward W.}
}
