Bedoya, Antonio, et al. “Vertebral Bone Maturation in Children 8 -14 Year-Old at Orthodontic Clinics of University Colleges of Colombia (UNICOC) Based in Cali”. Revista Estomatología, vol. 21, no. 2, July 2013, pp. 14-19, doi:10.25100/re.v21i2.5761.