G. A. Rubino, G. T. de Miranda Candeiro, E. F. Iglecias, Érico de M. Lemos, C. L. Caldeira, and G. Gavini, “Micro-CT Evaluation of Gutta-Percha Removal by Two Retreatment Systems”, Iran Endod J, vol. 13, no. 2, pp. 221–227, Apr. 2018.