Luarte Rocha, C., C. Flores Rivera, and F. Poblete Valderrama. “Gross Motor Development Level in NB2 Students from Talcahuano, 8th Region - Chile”. Revista Ciencias De La Actividad Física UCM, Vol. 13, no. 13, Dec. 2012, pp. 51-57, http://200.9.234.116/index.php/revistacaf/article/view/1184.