HUSSEIN AHMED AYED RABABA. The Wonders and Curiosities of the Number 9. Global Journal of Science Frontier Research, [S. l.], v. 23, n. F2, p. 39–41, 2023. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/102613. Acesso em: 20 apr. 2024.