SVERSTIUK, A. and MOSIY, L. (2025) “MATHEMATICAL MODEL OF EXTREMA VARIATIONS IN CHARACTERISTIC WAVES OF ELECTROCARDIOGRAPHIC SIGNALS BASED ON A DISCRETE FUNCTION OF  AMPLITUDE VARIABILITY”, Herald of Khmelnytskyi National University. Technical sciences, 355(4), pp. 404–413. doi:10.31891/2307-5732-2025-355-57.