References
- Cobb J. R. Amer. Acad. Orthop. Surg. J. W. Edwards, Ann Arbor 1948; 5: 261
- Ferguson A. B. Roentgen diagnosis of the extremities and spine. Paul Hoeber, Inc., N.Y. 1945
- George K., Rippstein J. J. Bone Jt Surg. 1961; 43-A: 809
- Lippman, Cited by Cobb.
- Lusskin R. Clin. Orthop. 1962; 23: 232