@phdthesis{Krishna-2014-1504,
  author = {Krishna, R},
  title = {Grid Connected Three-Level Converters},
  school = {Uppsala University},
  year = {2014},
  month = {mar},
  url = {http://www.diva-portal.org/smash/get/diva2:695395/FULLTEXT01.pdf},
  keywords = {Wave, Modeling, Grid Integration},
}