Potashev, S. V., S. V. Salo, A. Y. Gavrylyshyn, L. M. Hrubyak, O. M. Unitska, and S. V. Fedkiv. “Longitudinal Strain by Speckle Tracking During Dobutamine Stress Echocardiography in Suspected Coronary Arteries Disease”. Ukrainian Journal of Cardiovascular Surgery, no. 4 (41), Dec. 2020, pp. 15-25, doi:10.30702/ujcvs/20.4112/032015-025/73.7.