✓

@Book{            AAVV:2012aa,
  Author        = "AAVV",
  Editor        = "Rozenberg, Grzegorz and Salomaa, Arto",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:26 +0200",
  Publisher     = "Elsevier",
  Series        = "Theoretical Computer Science",
  Title         = "Formal and Natural Computing Honoring the 80th Birthday of Andrzej Ehrenfeucht",
  Volume        = "454",
  Year          = "2012",
  File          = "book (0) - a - a.pdf"
}

@Book{ AAVV:2012aa, Author = "AAVV", Editor = "Rozenberg, Grzegorz and Salomaa, Arto", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:26 +0200", Publisher = "Elsevier", Series = "Theoretical Computer Science", Title = "Formal and Natural Computing Honoring the 80th Birthday of Andrzej Ehrenfeucht", Volume = "454", Year = "2012", File = "book (0) - a - a.pdf" }