L., M., R. Rai, A. V., and A. V. Krishna. “Comparison of Modified Alvarado and RIPASA Scoring Systems Correlated With Intra-Operative Findings in Predicting Acute Appendicitis”. International Surgery Journal, vol. 8, no. 9, Aug. 2021, pp. 2662-8, doi:10.18203/2349-2902.isj20213593.