Patac, Jr., Adriano V., and Fernando T. Herrera. “Understanding Pre-Service Teachers Mathematical Concepts Representation for Problem Posing”. SDSSU MULTIDISCIPLINARY RESEARCH JOURNAL 5 (January 25, 2019): 7–14. Accessed August 6, 2026. https://smrj.nemsu.edu.ph/index.php/SMRJ/article/view/136.