KHALIL, Nazera Khalil. Teaching Average to Secondary School Students. Journal of Kufa for Mathematics and Computer, Kufa, Najaf, IRAQ, v. 1, n. 2, p. 123–131, 2010. DOI: 10.31642/JoKMC/2018/010210. Disponível em: https://journal.uokufa.edu.iq/index.php/jkmc/article/view/12812. Acesso em: 25 apr. 2026.