Jannah SM, Hendrayana A. Analysis of students’ mathematical concept understanding ability in learning after covid-19 pandemic at SMPN 1 Anyar. Math Didactic [Internet]. 22 Maret 2023 [dikutip 2 Agustus 2025];9(1):86-7. Tersedia pada: https://jurnal.stkipbjm.ac.id/index.php/math/article/view/1991