Coefficient of Voltage Energy Efficiency. - Piotr Gnacinski; Janusz Mindykowski; Marcin Peplinski; Tomasz Tarasiuk; Jose D. Costa; Mário Assunção; Luis Silveira; Vadym Zakharchenko; Alla Drankova; Mykola Mukha; Xiao-Yan Xu (IEEE Access, 2020)