Venskutonis, Tadas. 1. “Periapical Tissue Evaluation: Analysis of Existing Indexes and Application of Periapical and Endodontic Status Scale (PESS) in Clinical Practice”. Giornale Italiano Di Endodonzia 30 (1), 14-21. https://doi.org/10.32067/gie.2016.30.01.04.