J. F. Gómez Ortiz, M. Ballesteros Lozano, y A. Flores Ledesma, «Radiographical assessment of initial and final tipping in 60 patients treated without extractions at the Orthodontics Clinic of the DEPeI, UNAM 2010-2012», Rev Mex Ortodon, vol. 5, n.º 1, abr. 2017.