Butakhieo, W., A. Olanaramkul, P. Phintong, S. Puasiri, and P. Thaweesit. “A SEM Study of The Root Canal Filling Remnant and Patency between Bioceramic Sealer Group and Epoxy-Resin Sealer Group after Removing by Using Ni-Ti Rotary with Eucalyptus Oil and GuttaClear®”. Khon Kaen University Dental Journal, vol. 26, no. 2, May 2023, pp. 1-16, https://he01.tci-thaijo.org/index.php/KDJ/article/view/257059.