Yuksek, F. K., D. Gumus, and M. Kucuker. “Examination of Helicobacter Pylori DNA in Tap Waters and Bottled Drinking Waters”. Annals of Medical Research, vol. 28, no. 10, Oct. 2021, pp. 1840-4, http://www.annalsmedres.org/index.php/aomr/article/view/3937.