Kersulyte G, Navickas Z, Vainoras A, Gargasas L. Calculation of the Hankel Matrix Ranks of Electric and Haemodynamic Processes in the Heart. ELEKTRON ELEKTROTECH. 2009;91(3):43-48. Accessed February 7, 2026. https://eejournal.ktu.lt/index.php/elt/article/view/10498