I.R. Aghababyan, S.Sh. Joniev, F. A. Jumaev, F. Safarov, and I. Daminov. “Treatment Of Patients With Chronic Coronary Heart Disease of The Elderly And Senile Age With The Help Of High-Tech Methods”. Eurasian Medical Research Periodical, vol. 21, June 2023, pp. 70-75, https://geniusjournals.org/index.php/emrp/article/view/4577.