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Kulik, A.; Zaderihin, A.; Shulgin, V.; Martynenko, A. INDICATORS OF HEART RATE VARIABILITY IN HEALTHY VOLUNTEERS DEPENDING ON THE RESPIRATION RATE AND INHALATION-EXHALATION RATIO. J. V. N. Karazin Khark. Nat. Univ., Ser. Med. 1, 14-19.