RÜEGG, W. Geological and geomorphological features of the Ucayali Depression and Upper Amazon. Revista de la Asociación Geológica Argentina, [S. l.], v. 7, n. 2, p. 106-124, 1952. Disponível em: https://revista.geologica.org.ar/raga/article/view/968. Acesso em: 6 may. 2024.