Marshall KN, Cooper DJ, Hobbs NT (2014) Interactions among herbivory, climate, topography, and plant age shape riparian willow dynamics in northern Yellowstone National Park, USA. Journal of Ecology 102(3): 667-677.
Marshall, K. N., Thompson Hobbs, N. & Cooper, D. J. 2013. Stream hydrology limits recovery of riparian ecosystems after wolf reintroduction. Proceedings of the Royal Society B: Biological Sciences, 280.
Bilyeu D.M., D.J. Cooper, and N.T. Hobbs NT. 2007. Assessing impacts of large herbivores on shrubs: tests of scaling factors for utilization rates from shoot-level measurements. Journal of Applied Ecology 44:168-175.
Johnston D.B., D.J. Cooper, and N.T. Hobbs NT. 2007. Elk browsing increases aboveground growth of water-stressed willows by modifying plant architecture. Oecologia 154: 467-478.
Wolf, E. C., D. J. Cooper, and N. T. Hobbs. 2007. Hydrologic regime and herbivory stabilize an alternative state in Yellowstone National Park. Ecological Applications 17:1572–1587.