Niyomsujarit, N., A. Worahan, and M. Chaichalothorn. “Effects of cyclic acid challenge on the surface roughness of various flowable resin composites”. Mahidol Dental Journal, vol. 41, no. 3, Nov. 2021, pp. 187-96, https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/250896.