Rahmi Wahyuni, Dian Armanto, Edy Surya. 2026. “Designing, Validating, and Implementing the Seumapa Based Problem Solving (SBPS) Model Assisted by Flipbooks: An Educational Design Research Approach in Indonesian Elementary Mathematics”. International Journal of Special Education 41 (2):134-59. https://mail.internationalsped.com/index.php/ijse/article/view/3332.