FANONI, Fina; SURYOWATI, Eny. Junior High School Student’s Understanding Mathematics Concepts in Solving Problems of Flat-Sided Three Dimensional. Journal of Education and Learning Mathematics Research (JELMaR), [S. l.], v. 3, n. 2, p. 109–118, 2022. DOI: 10.37303/jelmar.v3i2.124. Disponível em: https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/124. Acesso em: 25 aug. 2026.