Szewczyk, W., Prajsner, A. and Szewczyk, M. (2016) “Pyelointerstitial, Pyelovenous, and Pyelosinus Backflow During Retrograde Pyelography”, Urology Journal, 13(6), pp. 2932–2933. doi: 10.22037/uj.v13i6.3789.