Perveen, S., M. Hossain, S. Hussain, M. Ahmed, and H. Aftab. “Evaluation & Management of Obscure Gastrointestinal Bleeding (OGIB)”. Journal of Bangladesh College of Physicians and Surgeons, vol. 28, no. 3, Nov. 2010, pp. 167-73, doi:10.3329/jbcps.v28i3.6512.