E. Vasquez, Sheley, R., and Svejcar, T.,
“Nitrogen Enhances the Competitive Ability of Cheatgrass (Bromus tectorum) Relative to Native Grasses”,
Invasive Plant Science and Management, vol. 151861639168–169287728534236918617139953428017960152587654167791565211404819319561501, no. 3, pp. 287 - 295, 2008.
R. Sheley, Vasquez, E., and Hoopes, C.,
“Functional Group Responses to Reciprocal Plant Litter Exchanges between Native and Invasive Plant Dominated GrasslandsAbstract”,
Invasive Plant Science and Management, vol. 2511010323, no. 02, pp. 158 - 165, 2009.