Contreras, I., E. Contreras, P. Araneda, and B. Solis. “Oral Health Status in 12 to 17-Year-Old School Children from Valle Nonguén, Concepción, 2013”. Journal of Oral Research, Vol. 2, no. 3, Nov. 2013, pp. 109-13, doi:10.17126/joralres.2013.025.