S. Barbosa-Granados, “Ansiedad precompetitiva en nadadores juveniles: análisis desde la percepción del nivel de dificultad competitivo (Precompetitive anxiety in young swimmers: analysis of the perceived competition difficulty)”, Retos, vol. 45, pp. 651–659, Jun. 2022, doi: 10.47197/retos.v45i0.90934.