Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. (Epicrates cenchria alvarezi, p. 6; E. c. barbouri, p. 16; E. c. gaigeae, p. 96).