Soysal, T., F. Ermis, and H. Ankarali. “α-Galactosidase Levels in Irritable Bowel Syndrome Subtypes and Quality of Life of Patients”. Annals of Medical Research, vol. 28, no. 10, Oct. 2021, pp. 1881-6, http://annalsmedres.org/index.php/aomr/article/view/3944.