ALMAN, Alman. The influence of open-ended and STAD method on the mathematical problem-solving skills in terms of learning achievement. Jurnal Prima Edukasia, [S. l.], v. 5, n. 2, p. 112–124, 2017. DOI: 10.21831/jpe.v5i2.14280. Disponível em: https://journal.uny.ac.id/index.php/jpe/article/view/14280. Acesso em: 4 jun. 2025.