Sánchez-Sanhueza, Gabriela, Gerardo González-Rocha, and Helia Bello-Toledo. 2015. “Enterococcus Spp. Isolated from Root Canals With Persistent Chronic Apical Periodontitis in a Chilean Population”. Brazilian Journal of Oral Sciences 14 (3). Limeira, SP:240-45. https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642879.