Agarwal, R., A. Agarwal, A. Kumar, and M. Kumar. “The Validity and Utility of Combining Ultrasonography With Different Clinical Scores in Diagnosis of Acute Appendicitis”. International Surgery Journal, vol. 6, no. 4, Mar. 2019, pp. 1084-92, doi:10.18203/2349-2902.isj20191131.