Youth soccer players, 11–14 years: Maturity, size, function, skill and goal orientation

António J. Figueiredo, Carlos E. Gonçalves, Manuel J. Coelho E Silva, Robert M. Malina
2009 Annals of Human Biology  
doi:10.1080/03014460802570584 pmid:19085511 fatcat:3qv53mfy3zba7kye2e3mdzd5zq