AHMAD, Owais; SIDDIQ, Shamsa; PERVEZ, Romana. Impact of Smartphone Addiction on Optimism and Academic Performance of University Students. Pakistan Journal of Positive Psychology, [S. l.], v. 3, n. 3, p. 14–21, 2026. Disponível em: https://pjpp.org/index.php/pjpp/article/view/107. Acesso em: 30 jul. 2026.