Souza, L. R. M. F. de, S. M. Goldman, S. Faintuch, J. F. Faria, D. Bekhor, D. A. Tiferes, V. Ortiz, P. Choyke, and J. Szejnfeld. “Comparison Between Ultrasound and Noncontrast Helical Computed Tomography for Identification of Acute Ureterolithiasis in a Teaching Hospital Setting”. São Paulo Medical Journal, vol. 125, no. 2, Mar. 2007, pp. 102-7, https://periodicosapm.emnuvens.com.br/spmj/article/view/2082.