Investigation of supercapacitor bidirectional power flow systemRankis, Ivars; Zakis, JanisScientific journal of Riga Technical University. Serija 4, Power and electrical engineering = Rīgas Tehniskās universitātes zinātniskie raksti. Serija 4. Energētika un elektrotehnika2012 / p. 35-40 : ill https://ortus.rtu.lv/science/en/publications/13864