Potapenko, S. V. 2016. “Peculiarities of Heart Rhythm Variability in Children and Adolescents With Arrhythmias in the Presence of Comorbidity of the Upper Gastrointestinal Tract”. Zaporozhye Medical Journal 18 (3). https://doi.org/10.14739/2310-1210.2016.3.76984.