Anis Cholis, Ribut Margo Mulyanto, Achmad Yusuf, Sari Cahya Putri, and Tuti Mutia, “Evaluating the Effectiveness of The Smarts Didi Model in Enhancing Teacher Competency for Differentiated Instruction in Indonesia: A Confirmatory Factor Analysis Approach”, Int. J. Geogr. Soc. Multicult. Educ., vol. 3, no. 3, pp. 1–13, Feb. 2026.