IRAWAN, A.; SURYA, E. Application of the Open Ended Approach to Mathematics Learning in the Sub-subject of Rectangular. International Journal of Sciences: Basic and Applied Research (IJSBAR), [S. l.], v. 33, n. 3, p. 270–279, 2017. Disponível em: https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7539. Acesso em: 6 may. 2024.