[1]
I. V. Shanina, D. E. Volkov, D. A. Lopin, and N. I. Yabluchansky, “QRS COMPLEX DURATION AND CLINICAL FEATURES OF PATIENTS WITH PERMANENT PACEMAKERS”, J. V. N. Karazin Khark. Nat. Univ., Ser. Med., no. 25, pp. 42-46, Jul. 2015.