الستار عبد الله ع. Symbol in the memory of Knowledge Verse. College of Basic Education Research Journal, [S. l.], v. 6, n. 1, p. 216–232, 2007. Disponível em: https://jeh.uomosul.edu.iq/index.php/berj/article/view/39273. Acesso em: 27 oct. 2025.