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@Book{            Pierce:2018aa,
  Author        = "Pierce, Benjamin",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:26 +0200",
  Title         = "Software Foundations",
  Year          = "2018",
  File          = "lf (0). - a - a",
  file-2        = "plf (0). - a - a",
  file-3        = "vfa (0). - a - a"
}

@Book{ Pierce:2018aa, Author = "Pierce, Benjamin", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:26 +0200", Title = "Software Foundations", Year = "2018", File = "lf (0). - a - a", file-2 = "plf (0). - a - a", file-3 = "vfa (0). - a - a" }