Rueda-Ibarra, V. ., B. I. . Jiménez-Valdés, H. E. . García-García, U. . Velázquez-Enríquez, S. E. . Lucas-Rincón, S. A. . López-Gomez, and C. E. Medina-Solís. “Using the Periapical Index to Evaluate the Healing of Periapical Lesions After Root Canal Treatment”. Giornale Italiano Di Endodonzia, vol. 34, no. 2, Oct. 2020, doi:10.32067/GIE.2020.34.02.01.