Nasir, Muhammad Ali, et al. “INJECTION SCLEROTHERAPY VERSUS RUBBER BAND LIGATION FOR SECOND DEGREE HEMORRHOIDS: Sclerotherapy Versus Rubber Band Ligation For Hemorrhoids”. Pakistan Armed Forces Medical Journal, vol. 67, no. 6, Dec. 2017, pp. 996-1002, https://pafmj.org/PAFMJ/article/view/1073.