1Dr. Chen-Hwu Wang M.D.. Urgent hemorrhoidectomy for hemorrhoidal crisis[J] 1982,Diseases of the Colon & Rectum(2):122~124
2Mandell I. Ganchrow M.D.,Harold E. Bowman M.D.,James F. Clark M.D.. Thrombosed hemorrhoids: A clinicopathologic study[J] 1971,Diseases of the Colon & Rectum(5):331~340