1. Luchtefeld MA. Anorectal physiology laboratory. In: Mazier WP, Luchtefeld MA, Levien DH, Senagore AJ, eds. Surgery of the colon, rectum, and anus. Philadelphia: WB Saunders, 1995:148.
2. Swash M. Anorectal manometry: techniques in health and anorectal disease. In: Henry MM, Swash M, eds. Coloproctology and the pelvic floor: pathophysiology and management. London: Butterworths, 1985:72.
3. Corman ML. Colon and rectal surgery. 3rd ed. Philadelphia: JB Lippincott, 1993:192.
4. Parks AG, Porter NH, Melzak J. Experimental study of the reflex mechanism controlling the muscles of the pelvic floor. Dis Colon Rectum 1962;5:407–14.
5. Read MG, Read NW. Role of anorectal sensation in preserving continence. Gut 1982;23:345–7.