• Development of auxiliary power supplies for the 3.0 kV DC rolling stock [Electronic resource]Vinnikov, Dmitri; Laugis, Juhan; Jalakas, TanelISIE2007 : 2007 IEEE International Symposium on Industrial Electronics : June 4-7, 2007, Vigo, Spain2007 / p. 359-364 [CD-ROM] https://ieeexplore.ieee.org/document/4374624