1. Deer-Vehicle Collision Report;Bates,2006
2. Betz, A., 2009. “No Harm, No Report”. Article published in The Gazette, Cedar Rapids, Iowa, May 11.
3. Bissonette, J. A. and P. C. Cramer, 2008. Evaluation of the Use and Effectiveness of Wildlife Crossings. NCHRP Synthesis 615, Transportation Research Board, Washington D.C.
4. Locations of Deer–vehicle Collisions are Unrelated to Traffic Volume or Posted Speed Limit;Bissonette;Human–Wildlife Conflicts,2008
5. Repellency of Three Compounds to Caribou;Brown;Wildlife Society Bulletin,2000