Javier Pretell, E., I. Gonzáles, J. Medina, A. Díaz, and H. H. García. “Brain calcifications and Perilesional Edema”. ACTA MEDICA PERUANA, Vol. 24, no. 1, Mar. 2007, pp. 31 -33, http://54.39.98.165/index.php/AMP/article/view/1230.