VIDAD, D. C.; QUIMBO, M. A. T. Students’ Problem-solving Difficulties and Coping Strategies in Mathematics: A Model- Building Study. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 20, n. 9, p. 136–173, 2021. Disponível em: http://www.ijlter.myres.net/index.php/ijlter/article/view/28. Acesso em: 31 jan. 2026.