AGIZEW, Kassahun Tesfaye; USHACHEW, Endalkachew Getachew; HURISA, Solomon Shiferaw; GIZAW, Dame Taye. Constraints of Students’ Mathematical Problem Solving and Proving Skill Competences, the Case of Four preparatory Schools in Guraghe Zone. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 40, n. 2, p. 18–29, 2018. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/8956. Acesso em: 13 sep. 2025.