1. Present Status of Hormonal and Drug Therapy of Ulcerative Colitis
2. Controlled trial of sulphasalazine in the treatment of ulcerative colitis
3. W. B. Gabriel (1963 ), "The Principles and Practice of Rectal Surgery ", 5th edition , H. K. Lewis & Co. Ltd, London: 379 .
4. J. C. Goligher, F. T. Dombral, J. McK. Watrs, and G. Watkinson (1968 ), "Ulcerative Colitis ", Bailliere, Tindall and Cassell, London: 208 .