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APA Citation
Sagirova, Z. H. N., Kuznetsova, N. O., Gogiberidze, N. A., Gognieva, D. G., Chomakhidze, P. S. H., & Kopylov, P. H. Y. U. (n.d.). the possibility of determining the systolic function of the left ventricle using a single-channel electrocardiogram monitor with photoplethysmography. European heart journal, 42, . http://access.bl.uk/ark:/81055/vdc_100144497193.0x00004f