1- Perez-Miranda M, Gomez-Cedenilla A, Leon-Colombo T, Pajares J, Mate-Jimenez J. Effect of fiber supplements on internal bleeding hemorrhoids. Hepatogastroenterology 1996;43(12):1504-7.

2- Sielezneff I, Antoine K, Lécuyer J, Saisse J, Thirion X, Sarles J, et al. [Is there a correlation between dietary habits and hemorrhoidal disease?]. Presse Med 1998;27(11):513-7.

3- Helfand M, Marton K, Zimmer-Gembeck K, Sox HJ. History of visible rectal bleeding in a primary care population. Initial assessment and 10-years follow-up. JAMA 1997;277(1):44-8.