1. ESWL for large renal calculi: the role of ureteral stents. A randomized trial;Bierkens;J. Urol.,1991
2. ESWL as monotherapy of staghorn renal calculi: 3 years of experience;Constantinides;J. Urol.,1989
3. Ureteral stents-materials and new forms. World J. Urol. 7, 154-157 an;Hofmann;J. Urol.,1989
4. Ureteral stents. Materials;Mardis;Urol. Clin. North Am.,1988
5. Use of double-pigtail stents in ESWL;Pryor;J. Urol.,1990