@article{Casado-Pérez2009,
author = {Casado-Pérez, C. and Alonso Fernández, N. and Hernández Barrera, V. and Jiménez García, R. },
title= {Actividad física en niños españoles: Factores asociados y evolución 2003–2006},
year = {2009},
doi = {10.4321/S1139-76322009000200003},
volume = {11},
number = {42},
pages = {218--232},
}