Hayes, John P., Stanley Z. Guffey, Frank J. Kriegler, Gary F. McCracken, and Charles R. Parker. "The Genetic Diversity of Native, Stocked, and Hybrid Populations of Brook Trout in the Southern Appalachians." Conservation Biology 10, no. 5 (1996): 1403-1412.

McCracken, Gary F., Charles R. Parker, and Stanley Z. Guffey. "Genetic Differentiation and Hybridization between Hatchery Stock and Native Brook Trout in Great Smoky Mountains National Park." Transactions of the American Fisheries Society 122, no. 4 (1993): 533-542.

McCracken, Gary F., Charles R. Parker, and Stanley Z. Guffey. "Genetic Differentiation and Hybridization between Stocked Hatchery and Native Brook Trout in Great Smoky Mountains National Park." Transactions of the American                        Fisheries Society 122, no. 4 (1993): 533-542.

Wathen, William Gregory, Gary F. McCracken, and Michael R. Pelton. "Genetic Variation in Black Bears from the Great Smoky Mountains National Park." Journal of Mammalogy 66, no. 3 (1985): 564-567.