Narayanan, A., S. Sundararaman, L. Varadhan, R. Rajput, V. Gupta, and N. Reay-Jones. “What Is Negative about Negative Appendicectomy Rates? An Experience from a District General Hospital”. International Surgery Journal, vol. 2, no. 2, Dec. 2016, pp. 161-4, https://www.ijsurgery.com/index.php/isj/article/view/516.