A R, S., N. R, K. R, B. V, and L. M. “Laparoscopic Appendicectomy in Higher Grades of Appendicitis”. Surgical Review: International Journal of Surgery, Trauma and Orthopedics, Vol. 3, no. 4, Dec. 2017, pp. 143-9, doi:10.17511/ijoso.2017.i04.09.