Ooi, J. Y., K. L. Koay, L. L. H. Tang, and R. Velayutham. “Trichobezoar With Duodenal Perforation: A Rare Occurrence”. International Surgery Journal, vol. 9, no. 11, Oct. 2022, pp. 1874-6, doi:10.18203/2349-2902.isj20222945.