LANGENHEIM, Jean H. Late paleozoic and early mesozoic plant fossils from the Cordillera Oriental of Colombia and correlation of the Giron Formation. Boletín Geológico, [S. l.], v. 8, n. 1-3, p. 95–132, 1960. DOI: 10.32685/0120-1425/bolgeol8.1-3.1960.371. Disponível em: https://revistas.sgc.gov.co/index.php/boletingeo/article/view/371. Acesso em: 6 mar. 2025.