1. Houston J. Observations on the mucous membrane of the rectum. Dub Hosp Rep 1830;5:158–65.
2. O'Beirne J. New views of the process of defecation, and their application to the pathology and treatment of diseases of the stomach, bowels, and other organs, together with an analytical correction of Sir Charles Bell's views respecting the nerves of the face, Dublin: Hodges and Smith, 1833.
3. Martin E, Burden VG. The surgical significance of the rectosigmoid sphincter. Ann Surg 1927;86:86–91.
4. Baillie M. The morbid anatomy of some of the most important parts of the body. London: J Johnson, 1793:111–9.
5. White W. Observations on strictures of the rectum and colon and other affections which diminish the capacity of the intestinal canal in those parts: including spasmodic constriction of the sphincter ani, heamorrhoidal tumors (called piles), excrescences, and prolapsus ani, accompanied with the mode of treatments, several cases and engravings. London: Longman, Hurst, Rees, Orme, Brown, 1824:28–41.