1. Fridenberg, R. M.: Excretory urography in the adult. In: Walsh, P. C., Retik, A. B., Stamey, T. A., Vaughan, E. D. Jr. (eds): Campbell's Urology, Sixth Edition. W.B. Saunders, Philadelphia 1992, p. 412.
2. Mukerjee, M. G., Deshon, G. E. Jr., Bruckman, J. A., Mittermeyer, B. T.: Urethrovascular reflux and its significance in urology.J. Urol., 112, 608 (1974).
3. Dawson, P., Grainger, R. G., Pitfield, J.: The new low-osmolar contrast media. A simple guide.Clin. Radiol., 34, 221 (1983).
4. Thomsen, H. S., Vestergaard, A., Nielsen, S. L., Fogh-Andersen, N., Golman, K., Dorph, S.: Renal clearance of an ionic high-osmolar and a nonionic low-osmolar contrast medium.Invest. Radiol., 26, 564 (1991).
5. Cochran, S. T., Ballard, J. W., Katzberg, R. W., Barbaric, Z. L., Spatare, R., Iwamoto, K., Lee, J. J.: Evaluation of iopamidol and diatrizoate in excretory urography. A doubleblind clinical study.A.J.R., 151, 523 (1988).