Hastings, Bruce Charles, Michael R. Pelton, Pamela A. Petko-Seus, and Francis J. Singer. Use of Backcountry Visitor Areas by Problem Bears in Great Smoky Mountains National Park In Conference on Science in the National Parks. WR 209 ed. Vol. 2. George Wright Society, 1987.

Singer, Francis J., Wayne T. Swank, and Edward E. C. Clebsch. "Effects of Wild Pig Rooting in a Deciduous Forest." Journal of Wildlife                        Management 48, no. 2 (1984): 464-473.

Singer, Francis J., Wayne T. Swank, and Edward E. C. Clebsch. Some Ecosystem Responses to European Wild Boar Rooting in a Decidous Forest In Research/Resources Management Report. Atlanta, GA: U.S. Department of the Interior, National Park Service, 1982.

Singer, Francis J., David P. LaBrode, and Lorrie Sprague. Beaver Reoccupation and an Analysis of the Otter Niche in Great Smoky Mountains National Park In Research/Resource Management                        Report. Gatlinburg, TN: U.S. Department of Interior, National Park Service, 1981.

Singer, Francis J., and Stuart E. Coleman. Ecology and Management of European Wild Boar in Great Smoky Mountains National Park In 2nd Conference on Scientific Research in National Parks. San Francisco, California , 1981.

Singer, Francis J., and Bruce B. Ackerman. Food Availability, Reproduction, and Conditions of European Wild Boar in Great Smoky Mountains National Park In Research/Resources Management Report. Gatlinburg, TN: Uplands Field Research Laboratory, 1981.

Howe, Thomas D., Francis J. Singer, and Bruce B. Ackerman. "Forage Relationships of European Wild Boar Invading Northern Hardwood Forest." Journal of Wildlife Management 45, no. 3 (1981): 748-754.

Singer, Francis J., Dale Kenneth Otto, Alan R. Tipton, and Charles P. Hable. "Home Ranges, Movements, and Habitat Use of European Wild Boar in Tennessee." The Journal of Wildlife Management 45, no. 2 (1981): 343-353.

Singer, Francis J.. "Wild Pig Populations in the National Parks." Environmental Management 5, no. 3 (1981): 263-270.

Singer, Francis J., Susan Power Bratton, and Clifford J. Martinka. "Black Bear/Human Conflicts in the Great Smoky Mountains National Park." In Bears -- Their Biology and Management:  Fifth International Conference on Bear Research and Management, 137-139. West Glacier, MT: International Association for Bear Research and Management, 1980.

LaBrode, David P., and Francis J. Singer. The Ecology of Beaver in Great Smoky Mountains National Park: Past, Present. and Future Speculations. University of Massachusetts at Amherst, 1980.

Singer, Francis J.. "A Comparison among Feral Pigs and European Wild Boar Populations." In 2nd Conference on Scientific Research in the National Parks, 245. National Park Service, Southeast Region, 1979.

Singer, Francis J., Dale Kenneth Otto, Alan R. Tipton, and Charles P. Hable. Home Ranges and Habitat Use of European Wild Boar. Gatlinburg, TN: U. S. Department of the Interior, National Park Service, Uplands Field Research Lab, 1979.

Bratton, Susan Power, Francis J. Singer, Mark E. Harmon, and Peter S. White. "Rooting Impacts of the European Wild Boar on the Vegetation of Great Smoky Mountains National Park During a year of Mast Failure." In 2nd. Conference on Scientific Research in the National Parks, 276-293. San Francisco, California, 1979.

Ackerman, Bruce B., Mark E. Harmon, and Francis J. Singer. Studies of European Wild Boar in the Great Smoky Mountains National Park, Part II: Seasonal Food Habits In Report to the Superintendent. U. S. Department of the Interior, National Park Service, Southeast Regional Office, 1978.

Ackerman, Bruce B., Mark E. Harmon, and Francis J. Singer. Studies of the European Wild Boar in the Great Smoky Mountains National Park, Part II, Seasonal Food Habits In First Annual Report, Part II to the Superintendent. Gatlinburg, TN: U.S. Department of the Interior, National Park Service, Southeast Regional Office, 1978.

Singer, Francis J., and Susan Power Bratton. Black Bear Management in Great Smoky Mountains National Park In Research/Resources Management Report. Great Smoky Mountains National Park, Gatlinburg, Tennessee: Uplands Field Reserach Laboratory, 1977.

Singer, Francis J.. Status of the European Wild Boar Project Great Smoky Mounatins National Park In Management Report. Gatlinburg, TN: Uplands Field Research Laboratory, Great Smoky Mountains National Park, 1976.