H. C. et al. Pulsed dye laser lithotripsy - the Tao Payoh Hospital experience., Br. 3. Urol., 1992;69:358-62.Ng FC, Ravi T, Lim PH, Chng HC. Pulsed dye laser hthotripsy-the Toa Payoh Hospital experience. Br JUrol 1992; 69(4): 358–362....