“LOW-LATITUDE MIOCENE CALCAREOUS AND SILICEOUS MICROFOSSIL BIOSTRATIGRAPHY FROM NW SOUTH AMERICA: LADRILLEROS-JUANCHACO SECTION, COLOMBIAN PACIFIC”. Ameghiniana, vol. 53, no. 6, Dec. 2016, pp. 629-44, https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2978.