Bhasin, S. K., S. L. Kachroo, V. Kumar, R. Kumar, and V. S. Chandail. “7” Long Knife for 7 Years in the Duodenum: A Rare Case Report and Review of Literature”. International Surgery Journal, vol. 1, no. 1, Dec. 2016, pp. 29-32, https://www.ijsurgery.com/index.php/isj/article/view/259.