Patarroyo, P., and S. Götz. “Lower Aptian Deposits With Ammonites and Rudists, Punta Espada, Alta Guajira (Uribia – Colombia). Lithostratigraphy and Regional Commentaries”. Boletín De Geología, vol. 42, no. 3, Sept. 2020, pp. 227-41, doi:10.18273/revbol.v42n3-2020010.