Sulaiman, Herri, Fuad Nasir, and I. Robia Khaerudin. “Efektivitas Lesson Study Pada Pemecahan Masalah Matematis Melalui Perkuliahan Online Di Masa Pandemi Covid 19”. SJME (Supremum Journal of Mathematics Education) 5, no. 2 (July 28, 2021). Accessed December 6, 2025. https://journal-fkip.unsika.ac.id/index.php/supremum/article/view/4668.