Kongsing, Sombuakom. “The Development of a Learning Model Using the DCP2C Problem-Solving Process to Enhance Academic Achievement and Problem-Solving Skills in Mathematics on the Topic of Conic Sections for Grade 10 Students”. Journal of Buddhist Education and Research (JBER) 10, no. 4 (December 31, 2024): 262–278. accessed August 28, 2026. https://so06.tci-thaijo.org/index.php/jber/article/view/278493.