Denison, Michelle E, Libia Soto, and Carlos Alfonso Reyes-Ortiz. “The Association Between Population Aging and Oral and Pharynx Cancer Incidence in the American Continent”. Colombia Medica 42, no. 2 (June 14, 2011): 191–198. Accessed December 3, 2025. http://colombiamedica.univalle.edu.co/index.php/comedica/article/view/770.