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@ebook{           Penrosea,
  Author        = "Penrose, Roger",
  date-added    = "2020-04-10 11:05:14 +0200",
  date-modified = "2020-04-10 11:05:14 +0200",
  Publisher     = "Oxford University Press",
  Title         = "The Emperor's New Mind",
  Year          = "1989",
  File          = "The Emperor's New Mind - Penrose (0) (0) (0) - a - a - a.pdf"
}

@ebook{ Penrosea, Author = "Penrose, Roger", date-added = "2020-04-10 11:05:14 +0200", date-modified = "2020-04-10 11:05:14 +0200", Publisher = "Oxford University Press", Title = "The Emperor's New Mind", Year = "1989", File = "The Emperor's New Mind - Penrose (0) (0) (0) - a - a - a.pdf" }