1. Dusold R, Burke K, Carpentier W, et al.The accuracy of technetium-99m-labeled red cell scintigraphy in localizing gastrointestinal bleeding.Am J Gastroenterol1994; 89:345-348.
2. Angiography and the gastrointestinal bleeder.
3. Helical CT angiography in gastrointestinal bleeding of obscure origin.
4. Indicator Transit Time Considered as a Gamma Variate
5. Powell MJD.Variable metric methods for constrained optimization.In: Bachem A, Grotschel M, Korte B, eds.Mathematical programming: the state of the art.New York, NY: Springer-Verlag, 1983; 288- 311.