1. Rodent ulcer of the anus;Armitage;Brit. J. Surg.,1955
2. Abdominoperineal proctosigmoidectomy with sphincter preservation;Bacon;J. A. M. A.,1956
3. Malignant lesions of the anal canal;Bernstein;Journal Lancet,1949
4. Malignant anal lesions of epithelial origin;Buie;Journal Lancet,1933
5. Basal cell carcinoma of the rectum;Burns;Arch. Surg.,1955