Abdurakhmanov I.T., Arifkhuzhaev A.T. “ELECTRICAL ACTIVITY OF THE ATRIALS IN CHILDREN WITH PREMATURE VENTRICULAR EXCITATION”. Ethiopian International Journal of Multidisciplinary Research, vol. 12, no. 06, June 2025, pp. 236-43, https://www.eijmr.org/index.php/eijmr/article/view/3296.