Kudinova А.К., Varlamova Н.Г., and Boyko Е.Р. 2023. “ECG Amplitude Parameters in Men of Different Ages During Submaximal Performance Testing (Exemplified by Residents of the European North of Russia)”. Journal of Medical and Biological Research 11 (3):255-64. https://doi.org/10.37482/2687-1491-Z146.