NOVRIANI, Milda Rizky; SURYA, Edy. Analysis of Student Difficulties in Mathematics Problem Solving Ability at MTs SWASTA IRA Medan. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 33, n. 3, p. 63–75, 2017. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/7437. Acesso em: 19 sep. 2025.