BOSTANCI, Ö.; KARADUMAN, E.; MAYDA, M. Investigation of self confidence levels in elite extreme athletes. Physical Education of Students, [S. l.], v. 23, n. 3, p. 106–111, 2019. DOI: 10.15561/20755279.2019.0301. Disponível em: https://www.sportedu.org.ua/index.php/PES/article/view/829. Acesso em: 14 jul. 2026.