Singha, J. L., S. Ahmad, N. Ahmed, S. Z. Nayeem, F. Rayhan, and F. U. Ahmed. “Evaluation of Diagnostic Accuracy of Anal Fistula by 360° Endoanal Ultrasound”. Journal of Shaheed Suhrawardy Medical College, vol. 10, no. 2, Apr. 2019, pp. 66-69, doi:10.3329/jssmc.v10i2.41159.