ИРЖАК, Л. И.; РУССКИХ, Н. Г.; ПАРШУКОВА, А. Н. Variability of Time and Amplitude ECG Indicators in Older Adults. Journal of Medical and Biological Research, [S. l.], v. 9, n. 4, p. 355–365, 2021. DOI: 10.37482/2687-1491-Z073. Disponível em: https://journals.narfu.ru/index.php/med/article/view/758. Acesso em: 14 nov. 2026.