1. Elkin M.Radiology of the urinary system.Boston, MA: Little Brown, 1980
2. Emmett JL, Witten DM.Clinical urography: an atlas and textbook of roentgenologic diagnosis,3rd ed., vol.1. Philadelphia, PA: WB Saunders,1971:268
3. Pollack HM, McClennan BL, Dyer RB, Kenney PJ, eds.Clinical urography, 2nd ed., vol.1. New York, NY: WB Saunders,2000:194
4. Diagnosis of acute flank pain: value of unenhanced helical CT.
5. THE VALUE OF UNENHANCED HELICAL COMPUTERIZED TOMOGRAPHY IN THE MANAGEMENT OF ACUTE FLANK PAIN