1. Kasser JR. The foot. In: Morissy RT, et al., editors. Lovell & winter’s pediatric orthopedics. 6th ed. Philadelphia: Lipincott Williams & Wilkins; 2006 .Electronic Text
2. Herring JA, et al. Disorders of the foot. In: Herring JA, editor. Tachdjian’s pediatric orthopedics. 4th ed. Philadelphia: Elsevier; 2008 .Electronic Text
3. Milbrandt TA, et al. Pediatric orthopedics. In: Miller MD, et al., editors. Review of orthopedics. 6th ed. Philadelphia: Elsevier; 2012. p. 255–84.
4. Kelly DM. Congenital anomalies of the lower extremity. In: Canale ST, et al., editors. Campbell’s operative orthopedics. 12th ed. Philadelphia: Elsevier; 2013. p. 980–1016.
5. Bauer K, et al. “What’s new in pediatric flatfoot?”. J Pediatr Orthop. 2015;PAP:1–5.