5Bacon HE. Evaluation of sphincter muscle preservation and reestablishment of continuity in the operative treatment of rectal and sigmoidal cancer. Surg Gynecol Obstet, 1945,81 ( 1 ) : 13.
6BaconHE. Abdominoperineal proctosigmoidectomy with sphincter preservation: five-year and ten-year survival after pull-through operation for cancer of rectum. JAMA, 1956,160 : 628.
