Rayamajhi, B. B.; Khadka, A.; Thakali, K.; Thapa, B. B.; Thapa, N.; Bhandari, B. B. Evaluation of Clinical Effectiveness of Topical 0.2% Glyceryl Trinitrate, Topical 2% Diltiazem and Their Combination in the Treatment of Chronic Anal Fissure. J. Kathmandu Med. Coll. 2020, 8, 156-161.