1. Bellisari A, Roche AF. Antropometría y ecografía. In: Heymsfield SB, Lohman TG, Wang ZM, Going SB, editors. Composición corporal. 2ª ed. México: McGraw Hill; 2007. p. 109–139.
2. Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986;1:307–10.
3. Boulier A, Fricker J, Thomasset A, Apfelbaum M. Fat-free mass estimation by two-electrode impedance method. Am J Clin Nutr. 1990;76:628–32.
4. Bray GA, DeLany JP, Harsha DW, Volaufova J, Champagne CC. Evaluation of body fat in fatter and leaner 10-y-old African American and white children: the Baton Rouge Children´s Study. A J Clin Nutr. 2001;73:687–702.
5. Brazier MA. The impedance angle test for thyrotoxicosis. Technic and study of normals. Western J Surg Obstet Gynecol. 1935;43:429–41.