Larsen, E.J. and Ripple, W.J. (2005). Aspen Stand Conditions on Elk Winter Ranges in the Northern Yellowstone Ecosystem, USA. Natural Areas Journal 25(4): 326-338.
Ripple, W.J. and Beschta, R.L. (2005). Linking Wolves and Plants: Aldo Leopold on Trophic Cascades. BioScience July 2005/Vol. 55 No. 7: 613-621 - Abstract
Ripple, W.J. and Beschta, R.L. (2005). Refugia from browsing as reference sites for restoration planning. Western North American Naturalist 65(2): 269-273.
Ripple, W.J. and Beschta, R.L. (2005).Willow thickets protect young aspen from elk browsing after wolf reintroduction. Western North American Naturalist 65(1): 118-122.
Ripple, William J. and Beschta, Robert L. (2004). Wolves and the Ecology of Fear: Can Predation Risk Structure Ecosystems? BioScience Augutst 2004/Vo.l 54 No. 8: 755-766.
Mystery in Yellowstone: wolves, wapiti, and the case of the disappearing aspen. Notable Notes, Oregon State University, 2004.
Bailey, J.K. and Whitham, T.G. (2003). Interactions among elk, aspen, galling sawflies and insectivorous birds. Oikos 101: 127-134.
Beschta, R.L. (2003). Cottonwoods, elk, and wolves in the Lamar Valley of Yellowstone National Park. Ecological Applications 13(5): 1295-1309.
Larsen, E.J. and W.J. Ripple. (2003). Aspen age structure in the northern Yellowstone Ecosystem:USA. Forest Ecology and Management. 179: 469-482.
Powell, D. Reintroduction of Wolves May End Tree and Shrub Decline in Yellowstone. The Forestry Source (December 2003).
Ripple, W.J. and Beschta, R.L. (2003). Wolf reintroduction, predation risk, and cottonwood recovery in Yellowstone National Park. Forest Ecology and Management 184: 299-313.
Humans, wolves, elk, aspen and willow, and now beetles (HWEAW+B) science workshop proceedings, February 5 & 6, 2002, Banff, Alberta.
Kleintjes, P.K. and Fettig, S.A. Butterflies, elk and aspen: what’s the connection? Proceedings of the 6th Symposium of Biological Research in the Jemez Mountains, New Mexico, January 24th, 2002.
Ripple, W.J. and Larsen, E.J. (2001). The Role of Postfire Coarse Woody Debris in Aspen Regeneration. Western North American Naturalist 16(2): 61-64.
Ripple, W. J., E. J. Larsen, R. A. Renkin, D. W. Smith. (2001). Trophic Cascades among wolves, elk and aspen on Yellowstone National Park’s northern range. Biological Conservation. 102:227-234.
Ripple, W.J. and Larsen, E.J. (2000). Historic aspen recruitment, elk, and wolves in northern Yellowstone National Park, USA. Biological Conservation 95: 361-370.
Larsen, E.J. and W.J. Ripple. Remote Sensing of Aspen Change in Northern Yellowstone National Park. Unpublished manuscript, 1997.