Salomon B. Kroonenberg, Jos G.M. Bakker, & A. Marian van der Wiel. (1990). Late Cenozoic uplift and paleogeography of the Colombian Andes: constraints on the development of high-andean biota. Netherlands Journal of Geosciences, 279-290. Retrieved from https://njgjournal.nl/index.php/njg/article/view/12870