Free Tournaments. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, [S. l.], v. 29, n. 2, p. 267–274, 2021. DOI: 10.29196/jubpas.v29i2.3875. Disponível em: https://www.journalofbabylon.com/index.php/JUBPAS/article/view/3875. Acesso em: 4 jul. 2025.