1. E. A. Codman(1934 ), "The Shoulder ." Boston, Thomas Todd and Company, page262 .
2. A. F. DePalma(1951 ), "Surgery of the Shoulder Philadelphia, J. B. Lippincott, page212 .
3. A. L. McGregor(1942 ), "A Synopsis of Surgical Anatomy ." Bristol, John Wright and Sons, page535 .