P. S., V., P. Tank, A. Singh, S. Goel, and P. Nathwani. “A Study of Gall Stone Disease from a Tertiary Care Center of Madhya Pradesh, India”. International Surgery Journal, vol. 4, no. 2, Jan. 2017, pp. 728-31, doi:10.18203/2349-2902.isj20170222.