Saxena, P., and Y. S. Bhakuni. “A Prospective Study on Suture Ligation of Internal Hemorrhoids Without Doppler Guidance for the Treatment of Symptomatic Hemorrhoid Disease”. International Surgery Journal, vol. 4, no. 2, Jan. 2017, pp. 671-6, doi:10.18203/2349-2902.isj20170211.