Phuvoravan, C., P. Boonyarith, and T. Pongchaipaiboon. “Prevention and Correction of Tooth Discoloration due to Regenerative Endodontic Treatment”. Khon Kaen University Dental Journal, vol. 26, no. 1, Feb. 2023, pp. 100-9, https://he01.tci-thaijo.org/index.php/KDJ/article/view/253890.