@Article{         Swett:2014aa,
  Author        = "Swett, Tanner and Aboufadel, Edward",
  date-added    = "2018-08-23 15:01:53 +0000",
  date-modified = "2018-08-23 15:02:34 +0000",
  Journal       = "Undergraduate Research",
  Title         = "Ordinary Generating Functions of Context-Free Grammars",
  Volume        = "3",
  Year          = "2014",
  File          = "Ordinary Generating Functions of Context-Free Grammars (0) - a - a - j.pdf"
}

@Article{ Swett:2014aa, Author = "Swett, Tanner and Aboufadel, Edward", date-added = "2018-08-23 15:01:53 +0000", date-modified = "2018-08-23 15:02:34 +0000", Journal = "Undergraduate Research", Title = "Ordinary Generating Functions of Context-Free Grammars", Volume = "3", Year = "2014", File = "Ordinary Generating Functions of Context-Free Grammars (0) - a - a - j.pdf" }