Prevosti, F.J., & Rincóon, A.D. A new fossil canid assemblage from the late Pleistocene of northern South America: the canids of the Inciarte asphalt pit (Zulia, Venezuela), fossil record and biogeography // J. Pal. 81 (5). 2007. DOI:10.1666/pleo05-143.1. с. 1053 – 1065.
Gompper, M. E.; Petrites, A. E. & Lyman, R. L. Cozumel Island fox (Urocyon sp.) dwarfism and possible divergence history based on subfossil bones // J. Zool. 270 (1). 2006. DOI:10.1111/j.1469-7998.2006.00119.x. с. 72 – 77.