Shil, B. C., R. K. Banik, S. K. Saha, M. O. Faruque, A. N. Islam, and M. H. Rahman. “Initial Experience With Endoscopic Ultrasound”. Bangladesh Medical Research Council Bulletin, vol. 41, no. 1, Nov. 2016, pp. 41-45, doi:10.3329/bmrcb.v41i1.30313.