J. A. Luengo Fereira, I. Toscano García, L. E. Carlos Medrano, and M. Anaya Álvarez, “Knowledge about oral health in a group of mexicans pregnants”, Acta Universitaria, vol. 28, no. 3, pp. 65–71, Aug. 2018, doi: 10.15174/au.2018.1477.