Drossman, D. A., and D. L. Dumitrascu. “Rome III: New Standard for Functional Gastrointestinal Disorders”. Journal of Gastrointestinal and Liver Diseases, vol. 15, no. 3, Sept. 2006, pp. 237-41, https://www.jgld.ro/jgld/index.php/jgld/article/view/2006.3.5.