VENDRUSCOLO, D. G. S., F. H. GAVA, R. DRESCHER, H. S. SOUZA, G. V. CALDEIRA, and R. S. da SILVA. “F”. Brazilian Journal of Biometrics, vol. 34, no. 4, Dec. 2016, pp. 564-7, http://www.biometria.ufla.br/index.php/BBJ/article/view/248.