Khuwutthayakorn, Yutthana, Kamonchanok Sopa, Kalyarat Chaiklangmuang, Thanakorn Wongthana, Pornchanich Tangsumpanta, and Supitcha Ekpatanaparnich. “Efficacy of light curing unit prototype on surface hardness of resin composite as a function of tilt angle”. Chiang Mai Dental Journal 41, no. 3 (December 9, 2020): 65–73. accessed January 7, 2026. https://he01.tci-thaijo.org/index.php/cmdj/article/view/246393.