Jowder, F.A.L.: 'Design and analysis of dynamic voltage restorer for deep voltage sag and harmonic compensation', IET Generation, Transmission & Distribution, 2009, 3, (6), p. 547-560, DOI: 10.1049/iet-gtd.2008.0531
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1c8x79z48g92g.x-iet-live-01content/journals/10.1049/iet-gtd.2008.0531