1. Abbate, Ch.: Avulsion fracture of the ischial tuberosity. J. Bone Jt Surg. 27, 716 (1945).
2. Berry, J.: Fracture of the tuberosity of the ischium due to muscular action. J. Amer. med. Ass. 59, 1450 (1912).
3. Caffey, J.: Pediatric X-Ray Diagnosis, p. 469. Chicago: The Year Book Publ. 1950.
4. Castellana, A.: Les Apophysiolyses de L'ischion. Rev. Orthop. 34, 145 (1948).
5. Cohen, H.: Avulsion fracture of the ischial tuberosity. J. Bone Jt Surg. 19, 1138 (1937).