@InProceedings{   birdtree,
  Author        = "Hinze, Ralf",
  BookTitle     = "Journal of Functional Programming",
  date-added    = "2017-06-26 17:39:41 +0000",
  date-modified = "2017-06-26 17:40:59 +0000",
  Title         = "Functional Pearls: The Bird Tree",
  File          = "Bird (0) - a - a - k.pdf"
}

@InProceedings{ birdtree, Author = "Hinze, Ralf", BookTitle = "Journal of Functional Programming", date-added = "2017-06-26 17:39:41 +0000", date-modified = "2017-06-26 17:40:59 +0000", Title = "Functional Pearls: The Bird Tree", File = "Bird (0) - a - a - k.pdf" }