AlRumaih, A., A. Alzakari, A. Alkhaibary, and F. Alghanim. “Extensive Retroperitoneal Hematoma After Laparoscopic Appendectomy”. International Surgery Journal, vol. 5, no. 10, Sept. 2018, pp. 3399-02, doi:10.18203/2349-2902.isj20184097.