POLLEY, J. W. Management of severe maxillary deficiency in childhood and adolescence through distraction osteogenesis with an external, adjustable, rigid distraction device. J Craniomaxillofac Surg. 1997, 8, 181-186
FIGUEROA, A. Management of severe cleft maxillary deficiency with distraction osteogenesis: Procedure and results. Am J Orthod Dentofacial Orthop. 1999, 115, 1-11