Vitols, Aigars, and Ivars Rankis. “Experimental Results from Physical Model of Bidirectional Power Flow Regulator for Power Substations of Electrical Transport”. Electrical, Control and Communication Engineering 25, no. 25 (January 1, 2009): 127–132. Accessed November 5, 2024. https://ecce-journals.rtu.lv/ecce/article/view/v10144-009-0027-x.