Haji, A. G., N. Sivakumar, B. Piramanayagam, and A. Palit. “Eating Styrofoam Balls Presented As Intestinal Obstruction- PICA Associated With Bezoar: A Rare Case Report and Review of Literature”. International Surgery Journal, vol. 9, no. 12, Nov. 2022, pp. 2034-6, doi:10.18203/2349-2902.isj20223016.