F. A. Lara-Hernández, J. Peña-Serrano, and V. Vásquez-Cruz, “A dicephalic Western Dusky Rattlesnake, Crotalus triseriatus (Squamata: Viperidae)”, RandA, vol. 27, no. 3, pp. 530–531, Dec. 2020, doi: 10.17161/randa.v27i3.14913.