Martis, J., S. Honório, A. M. Costa, M. Batista, and J. Cardoso. “Longitudinal Study of Physical Fitness Levels, BMI and Childhood Obesity in School Context”. Journal of Human Sport and Exercise, vol. 9, no. 2, Mar. 2015, pp. 645-5, doi:10.14198/jhse.2014.92.04.