1. Nonobstructive hydronephrosis and hydroureter;Shopfner;Am. J. Roentgenol. Radium Ther. Nucl. Med.,1966
2. Ureteropelvic junction obstruction;Shopfner;Am. J. Roentgenol. Radium Ther. Nucl. Med.,1966
3. Roentgenological evaluation of bladder neck obstruction;Shopfner;Am. J. Roentgenol. Radium Ther. Nucl. Med.,1967
4. Roentgen evaluation of distal urethral obstruction;Shopfner;Radiology,1967
5. Vesicoureteral reflux five-year evaluation;Shopfner;Radiology,1970