1. The expert council meeting on the problem of chronic constipation. Rossiуskiу Zhurnal Gastroehnterologii, Gepatologii, Koloproktologii, 2011, 21 (4): 90-1.
2. Prilepskaya SI, Parfenov AI, Lazebnik LB, et al. The prevalence and risk factors of constipation in the adult population of Moscow according to the MUZA population study. Eksperimentalnaya i Klin. Gastroehnterologiya, 2011, 3: 68-73.
3. Erdes SI, Matsukatova BO. Prevalence and features of constipation in children in Russia: the population study results. Vopr. Sovr. Pediatrii, 2010, 4: 50-56.
4. Vandenplas Y, Levy E, Lemmens R, Devreker T. Functional constipation in children. Consilium Medicum. Pediatrics (adj.), 2017, 1: 66-73.
5. Tabbers MM, DiLorenzo C, Berger MY et al. Evaluation and treatment of functional constipation in infants and children: evidence-based recommendations from ESPGHAN and NASPGHAN. J Pediatr Gastroenterol Nutr, 2014, 58(2): 258–74.