Parween, S., S. Mehboob, B. A. Sultan, Z. Irshad, A. Shaikh, and S. K. Langhani. “To Determine the Frequency of H. Pylori Infection and Its Association With Lymphoid Follicle Formation in Gastritis”. Journal of Liaquat University of Medical & Health Sciences, vol. 19, no. 03, Oct. 2020, pp. 181-4, http://121.52.154.205/index.php/jlumhs/article/view/401.