Çağan-Appak, Yeliz, et al. “Clarithromycin Resistance and 23S RRNA Gene Point Mutations of Helicobacter Pylori Infection in Children”. The Turkish Journal of Pediatrics, vol. 58, no. 4, Aug. 2016, pp. 371-6, https://doi.org/10.24953/turkjped.2016.04.004.