1. Barton J (2002) Nitroglycerin and lidocaine topical treatment for anal fissure. RxTriad 5(4):1–2
2. Poh A, Tan KY, Choen FS (2010) Innovations in chronic anal fissure treatment: a systematic review. World J Gastrointest Surg 2(7):231–241
3. Yakovlev A, Karasev SA, Dolgich OY (2011) Sacral nerve stimulation: a novel treatment of chronic anal fissure. Dis Colon Rectum 54:324–327
4. Nelson RL, Thomas K, Morgan J, Jones A (2012) Non surgical therapy for anal fissure. Cochrane Database Syst Rev 2:CD003431, Review. PubMed PMID:22336789
5. Nelson RL, Chattopadhyay A, Brooks W, Platt I, Paavana T, Earl S (2011) Operative procedures for fissure in ano. Cochrane Database Syst Rev 9(11):CD002199, Review. PubMed PMID: 22071803