Segura Castro, D. et al. 2018. SELF-EFFICACY, PRECOMPETITIVE ANXIETY AND SELF-PERCEPTION OF PERFORMANCE IN UNDER 17 AND JUVENILE SOCCER PLAYERS. MHSalud: Revista en Ciencias del Movimiento Humano y Salud. 15, 2 (Aug. 2018), 1–15. DOI:https://doi.org/10.15359/mhs.15-2.3.