2WOllin TA. Densteddt J D The holmium laser in Uroloy. J Clin Laser Med Surg, 1998,161 : 13- 20.
3Sun Y H,Wang L H, Qian S X, et al. Treatment of urinary Calculi with the ureteroseopy and Swiss-Lithoelast pneumatic lithotripter(report of 150 eases). J Endourol, 2000,14 : 281-283.