Kim, Seok-Kyoon: 'Performance-recovery proportional-type output-voltage tracking algorithm of three-phase inverter for uninterruptible power supply applications', IET Circuits, Devices & Systems, 2019, 13, (2), p. 185-192, DOI: 10.1049/iet-cds.2018.5377
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1xczf788hcrvp.x-iet-live-01content/journals/10.1049/iet-cds.2018.5377