Myers, C. W., Ibanez D., R., & Cadle, J. E. (2007). On the uniquely fragmented distribution of a rare Panamanian snake, Dipsas nicholsi (Colubridae: Dipsadinae). American Museum of Natural History.

Myers, Charles W., Roberto Ibanez D., and John E. Cadle. On the Uniquely Fragmented Distribution of a Rare Panamanian Snake, Dipsas Nicholsi (Colubridae: Dipsadinae). New York: American Museum of Natural History, 2007.

Myers, Charles W., et al. On the Uniquely Fragmented Distribution of a Rare Panamanian Snake, Dipsas Nicholsi (Colubridae: Dipsadinae). American Museum of Natural History, 2007.