Hafner, Mark S.; Barkley, Linda J. (1984). "Genetics and Natural History of a Relictual Pocket Gopher, Zygogeomys (Rodentia: Geomyidae)". Journal of Mammalogy. 65 (3): 474–479. doi:10.2307/1381094. JSTOR1381094.
Hafner, Mark S.; Hafner, John C. (1982). "Structure of Surface Mounds of Zygogeomys (Rodentia: Geomyidae)". Journal of Mammalogy. 63 (3): 536–538. doi:10.2307/1380465. JSTOR1380465.
Hafner, Mark S.; Barkley, Linda J. (1984). "Genetics and Natural History of a Relictual Pocket Gopher, Zygogeomys (Rodentia: Geomyidae)". Journal of Mammalogy. 65 (3): 474–479. doi:10.2307/1381094. JSTOR1381094.
Hafner, Mark S.; Hafner, John C. (1982). "Structure of Surface Mounds of Zygogeomys (Rodentia: Geomyidae)". Journal of Mammalogy. 63 (3): 536–538. doi:10.2307/1380465. JSTOR1380465.