RAMON, Juan Carlos. Oil geochemistry of the Putumayo basin. CT&F - Ciencia, Tecnología y Futuro, [S. l.], v. 1, n. 2, p. 25–34, 1996. DOI: 10.29047/01225383.595. Disponível em: https://ctyfjournalecopetrolcomco.biteca.online/index.php/ctyf/article/view/595. Acesso em: 27 feb. 2026.