[1]
D. T. Dimitrov and N. D. Ralev, “Signals and Systems for Electrosleep”, ELEKTRON ELEKTROTECH, vol. 93, no. 5, pp. 95–98, May 2009, Accessed: Jan. 23, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/10191