“Leños fósiles De Boraginaceae De La Formación Peñas Coloradas (Paleoceno superior), Puerto Visser, Chubut Argentina”. Ameghiniana 43, no. 1 (March 25, 2006): 139–146. Accessed October 7, 2025. https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/747.