M. Giraldo, D. Barbosa, Óscar Zapata, and H. N. Jaramillo, “Correlation between the seric levels of dehidroepiandrosterone sulphate with the skeletal maturation stages: final paper”, Rev Fac Odontol Univ Antioq, vol. 18, no. 2, pp. 45–58, Nov. 2009.