Gupta, Pravin Jaiprakash. “Radiofrequency Fistulotomy: A Better Alternative for Treating Low Anal Fistula”. São Paulo Medical Journal 122, no. 4 (July 7, 2004): 172–174. Accessed October 16, 2025. https://periodicosapm.emnuvens.com.br/spmj/article/view/2513.