Almuawi, A., O. Alsamahy, M. Fahiem-Ul-Hassan, and B. Abdelhamid. “Trichobezoar: A Rare Clinical Rendezvous With Twin Sisters”. International Surgery Journal, vol. 8, no. 1, Dec. 2020, pp. 371-4, doi:10.18203/2349-2902.isj20205906.