Kabir, T., and W. K. Yong. “Perforated Appendicitis With Peri-Appendicular Abscess Within an Incisional Hernia: A Report of an Unusual Case”. International Surgery Journal, vol. 6, no. 1, Dec. 2018, pp. 299-03, doi:10.18203/2349-2902.isj20185492.