1. Laparoscopic colectomy for colonic carcinoma. In: editors. Cancer of the colon, rectum, and anus. New York: McGraw-Hill, Inc., 1995: 455-64.
2. editors. UICC TNM classification of malignant tumours. 4th edition. 2nd revision. Tokyo: Springer-Verlag, 1992: 52-5.
3. Japanese Research Society for Cancer of the Colon and Rectum. General rules for clinical and pathological studies on cancer of the colon, rectum and anus. 5th edition. Tokyo: Kanehara, 1994: 14-25.