Biswas, Swapan Kumar, et al. “Ligation of the Intersphincteric Fistula Tract (LIFT) Technique in the Treatment of Complex Perianal Fistula: Experience of First 50 Cases”. Faridpur Medical College Journal, vol. 15, no. 1, Sept. 2020, pp. 3-7, doi:10.3329/fmcj.v15i1.48999.