Athavale, V. S., S. N. Khandalkar, P. C. Bhide, I. Shetty, and A. Lad. “A Study of Association of H. Pylori Infection and Cholelithiasis”. International Surgery Journal, vol. 5, no. 2, Jan. 2018, pp. 701-4, doi:10.18203/2349-2902.isj20180377.