HUSSEIN MOHAMMED, A. Constructing an optimism scale for the students of physical education college in the University of Mosul and it is relation with academic achievement. Al-Rafidain Journal For Sport Sciences, [S. l.], v. 16, n. 53, p. 168–185, 2010. DOI: 10.33899/rajsport.2010.6091. Disponível em: https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50728. Acesso em: 2 oct. 2025.