1. Flegel M. Sport First Aid. 5th ed. Champaign, USA: Human Kinetics; 2013.
2. Tegner Y, Lysholm J. Rating systems in the evaluation of knee ligament injuries. Clin Orthop Related Res. 1985;198:42–9.
3. Beggs I. Musculoskeletal Ultrasound. 1st ed. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins; 2014.
4. Trevino SG, Davis P, Hecht PJ. Management of acute and chronic lateral ligament injuries of the ankle. Orthop Clin N Am. 1994;25(1):1–16.
5. Rao S, Riskowski JL, Hannan MT. Musculoskeletal conditions of the foot and ankle: assessments and treatment options. Best Prac Res Clin Rheumatol. 2012;26(3):345–68.