Thorington, R.W., Jr., Koprowski, J.L., Steele, M.A., and Whatton, J. (2012) Squirrels of the World. Johns Hopkins University Press, Baltimore, 472 pp.
Doumas, Sandra L.; Koprowski, John L. (2013). "Return of Fire as a Restoration Tool: Long-Term Effects of Burn Severity on Habitat Use by Mexican Fox Squirrels". Restoration Ecology. 21: 133–139. doi:10.1111/j.1526-100X.2012.00864.x. S2CID53664867.
Doumas, Sandra L.; Koprowski, John L. (2013). "Return of Fire as a Restoration Tool: Long-Term Effects of Burn Severity on Habitat Use by Mexican Fox Squirrels". Restoration Ecology. 21: 133–139. doi:10.1111/j.1526-100X.2012.00864.x. S2CID53664867.