1. Wernick J, Volpe RG. Lower extremity function and normal mechanics. In: Valmassy RL, editor. Clinical biomechanics of the lower extremities. St Louis, MO: Mosby Year Book; 1996. p. 2–57.
2. Nester CJ. Review of literature on the axis of rotation at the subtalar joint. Foot. 1998;8:111–8.
3. Sarrafian SK. Biomechanics of the subtalar joint complex. Clin Orthop Res. 1993;290:17–26.
4. Hutton WC, Dhanendran M. The mechanics of normal and hallux valgus feet—a quantitative study. Clin Orthop Relat Res. 1981;157:7–13.
5. Root ML, Orien WP, Weed JH. Clinical biomechanics: normal and abnormal function of thefoot. Los Angeles, CA: Clinical Biomechanics Corp.; 1977. p. 2.