5Dr. Amnon Sonnenberg M.D.,Timothy R. Koch M.D.. Epidemiology of constipation in the United States[J] 1989,Diseases of the Colon & Rectum(1):1～8
6W. Clough Wallace M.D.,William M. Madden M.D.. Experience with partial resection of the puborectalis muscle[J] 1969,Diseases of the Colon & Rectum(3):196～200
7Iso F. Wasserman M.D.. Puborectalis syndrome (rectal stenosis due to anorectal spasm)[J] 1964,Diseases of the Colon & Rectum(2):87～98
