1. Singhal GD, et al. Bhagandara nidana adhyaya, 4th chapter. Sushrutha samhitha Ancient Indian Surgery part I. Delhi: Chaukambha Sanskrit samsthana, 530.
2. Efficacy of Kshar Sutra (medicated Seton), therapy in the management of fistula-in-ano;Pankaj;World Journal of Colorectal Surgery,2010
3. An unusual case of complex transphincteric fistula-in-ano;Belekar;The Internet Journal of Surgery,2009
4. Singhal GD, et al. Bhagandara chikitsa adhyaya, 17th chapter. Sushrutha samhitha AncientIndian Surgery part II. Delhi: Chaukambha Sanskrit samsthana, 319.
5. Investigation of human fetal anal ducts and intermuscular glands and a clinical study of 150 patients;Lilius;Acta Chirurgica Scandinavica,1968