Gehlot, Valentina, et al. “THERAPEUTIC POTENTIAL OF LICHEN PARMELIA PERLATA AGAINST DUAL DRUG-RESISTANT HELICOBACTER PYLORI ISOLATES”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 8, no. 1, Jan. 2016, pp. 205-8, https://www.journals.innovareacademics.in/index.php/ijpps/article/view/9478.