1. Punch biopsy of tumours of rectum and pararectal area;Baron J. I.;Amer. J. Proctol.,1969
2. The earlier diagnosis of adenocarcinoma of the large Intestine;Gilbersten V. A.;Cancer,1971
3. Adenocarcinoma of the Large Bowel
4. Factors in the Prognosis of Adenocarcinoma of the Colon and Rectum
5. Bowel cancer detection: Experience with 75,000 proctoslgmoidoscoplc examinations;Gilbertsen V. A.;Proc. nat. Cancer Conf.,1970