M. C. A. Moreira-Nacif, M. F. V. Marceliano-Alves, and F. R. Ferreira-Alves, “Contamination of -percha cones in clinical use by endodontic specialists and general practitioners”, Rev Fac Odontol Univ Antioq, vol. 28, no. 2, pp. 327–340, Jun. 2017.