Rakhimova M.E, and Nobo’toyev O.M. “The Role of Cystatin C in the Diagnosis of Renal Dysfunction in Patients With Coronary Heart Disease”. Eurasian Medical Research Periodical, vol. 24, Sept. 2023, pp. 31-36, https://geniusjournals.org/index.php/emrp/article/view/4929.