Serhat BOR, et al. “The Comparsion of Teo Different Asophageal Motility Cathaters Recording Lower Esophageal Sphincter Pressure”. Turkish Journal of Gastroenterology, vol. 7, no. 1, July 2019, pp. 49-52, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/1211.