Lazzarin, T.B. and Barbi, I. 2012. Design of a 660 V / 15 kVA single-phase UPS based on series connection of low-output-voltage modular UPS. Eletrônica de Potência. 17, 3 (Aug. 2012), 584–591. DOI:https://doi.org/10.18618/REP.2012.3.584591.