@article {KNZ00697,
	title = {The keystone role of bison in North American tallgrass prairie},
	journal = {BioScience},
	volume = {49},
	year = {1999},
	pages = {39 -50},
	keywords = {LTER-KNZ},
	url = {http://www.jstor.org/stable/10.1525/bisi.1999.49.1.39},
	author = {Alan K. Knapp and John M. Blair and J. M. Briggs and Scott. L. Collins and D.C. Hartnett and Johnson, L.C. and Towne, E.G.}
}
