Mayorga Lascano, P. M., Jaramillo, Álvaro, y Moreta-Herrera, R. (2021). Competitive anxiety and self-efficacy in high performance tennis players before and after a competition. Revista Guillermo de Ockham, 18(1), 45–54. https://doi.org/10.21500/22563202.4526 (Original work published June 9, 2020)