1. Diseases of Anus, Rectum, and Sigmoid;Earle,1911
2. Internal piles;Miles;Surg., Gynec. & Obst.,1918
3. The pathogenesis of anal fissure;Blaisdell;Surg., Gynec. & Obst.,1937
4. Operaive injury to the anal sphincter;Blaisdell;J. A. M. A.,1939
5. Fissure-in-ano, its pathogenesis and treatment;Gorsch;M. World,1938