Reigal-Garrido, R. E., C. A. Becerra-Fernández, A. Hernández-Mendo, and I. Martín-Tamayo. “Relationships of Self-Concept With Physical Fitness and Body Composition in a Sample of Adolescents”. Anales De Psicología / Annals of Psychology, Vol. 30, no. 3, Aug. 2014, pp. 1079-85, doi:10.6018/analesps.30.3.157201.