Teeyapaiboolsin, Withamon. 2011. “Immediate Vs Delayed Voltage Escalation During Extracorporeal Shock Wave Lithotripsy (ESWL) in Urinary Calculi: Does It Effect Out- come?, a Randomized Controlled Trial”. Insight Urology 32 (1):9-13. https://he02.tci-thaijo.org/index.php/TJU/article/view/252420.