SINGH, Jaswinder. An Analysis of Mental Toughness Between Successful and Unsuccessful Athletes in Track and Field. IARS’ International Research Journal, Victoria, Australia, v. 10, n. 1, 2020. DOI: 10.51611/iars.irj.v10i1.2020.109. Disponível em: https://researth.iars.info/index.php/curie/article/view/109.. Acesso em: 26 nov. 2024.