Trongtortam S, Sophatsathit P, Chandrachai A. An Interactive Multi-touch Teaching Innovation for Preschool Mathematical Skills. Applied Science and Engineering Progress [internet]. 2013 Aug. 30 [cited 2026 Sep. 18];5(3):19-25. available from: https://ph02.tci-thaijo.org/index.php/ijast/article/view/67319