MARLINDA, Sheli; EFFENDI, Kiki Nia Sania. Students’ Epistemological Obstacle in Solving Problems on the Subject of Quadratic Equations. Radian Journal: Research and Review in Mathematics Education, [S. l.], v. 2, n. 4, p. 151–165, 2024. DOI: 10.35706/rjrrme.v2i4.12091. Disponível em: https://journal-fkip.unsika.ac.id/index.php/radian/article/view/12091. Acesso em: 13 feb. 2026.