Siyar, Falak, et al. “TREATMENT OF HIGH TRANS-SPHINCTERIC ANAL FISTULA: COMPARISON OF ANAL FISTULA PLUG USING SURGICAL VERSUS CUTTING SETON”. Pakistan Armed Forces Medical Journal, vol. 67, no. SUPPL-1, Oct. 2020, pp. S6-9, https://pafmj.org/PAFMJ/article/view/5657.