SHOLIHAH, Ummu; ASYHAR, Beni; LUKMANA, Dana Arif. A qualitative study of students’ semiotic ability in calculus problem representation: A visual thinking perspective. Journal Focus Action of Research Mathematic (Factor M), [S. l.], v. 9, n. 1, p. 43–60, 2026. DOI: 10.30762/f_m.v9i1.8184. Disponível em: https://jurnalfaktarbiyah.iainkediri.ac.id/index.php/factorm/article/view/8184. Acesso em: 28 sep. 2026.