L. P. de Andrade, F. Stella, F. A. Barbieri, N. M. Rinaldi, Ágata Y. Y. Hamanaka, and L. T. B. Gobbi, “Effects of the cognitive tasks in the postural control of elderly: A systematic revision”, Motricidade, vol. 7, no. 3, pp. 19–28, Sep. 2011.