(1)
Shmidt, E. Y.; Kulik, A. L.; Martynenko, A.; Yabluchansky, N. I. CLOSED LOOP BIOFEEDBACK OF HEART RATE VARIABILITY AND PACED BREATHING EFFICACY EVALUATION IN PATIETS WITH ARTERIAL HYPERTENSION. J. V. N. Karazin Khark. Nat. Univ., Ser. Med. 1, 63-67.