Akhiiezer, O., Dunaievska, O., Shyshkin, M., Butova, O. and Rohovyi, A. (2019) “USE OF TRIANGULAR MODELS OF NON-STATIONARY PROCESSES IN MODELING VARIABILITY OF HEART RHYTHM”, INNOVATIVE TECHNOLOGIES AND SCIENTIFIC SOLUTIONS FOR INDUSTRIES, (1 (7), pp. 5–15. doi: 10.30837/2522-9818.2019.7.005.