Rai, Prakriti, Chuchai Anunmana, and Potchaman Sinavarat. 2020. “The Relative Translucency and Fracture Toughness of Different Zirconia Ceramics”. Mahidol Dental Journal 40 (1). Bangkok, Thailand:52-60. https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/239915.