@article {39096,
	title = {Variation in the diversity of ducks along a gradient of environmental variability},
	volume = {93},
	year = {1993},
	pages = {242-250},
	publisher = {Oecologia},
	url = {http://www.springerlink.com/content/r1515035634l77r6/fulltext.pdf},
	author = {Bethke, Raymond W. and Nudds, Thomas D.}
}
