LANGENHEIM, J. H. Preliminary Notes on Plant Fossils from Late Paleozoic and Early Mesozoic Rocks in the Cordillera Oriental of Colombia. Boletín de Geología, [S. l.], n. 3, p. 51–53, 1959. Disponível em: https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/4003. Acesso em: 18 may. 2024.