SZYNDLAR, Z. A review of neogene and quaternary snakes of Central and Eastern Europe. Part 11: natricinae, elapidae, viperidae. Estudios Geológicos, [S. l.], v. 47, n. 3-4, p. 237–266, 1991. DOI: 10.3989/egeol.91473-4422. Disponível em: https://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/422. Acesso em: 29 mar. 2024.