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@Book{            Buchic,
  Author        = {B{\"u}chi, Richard},
  Editor        = "Siefkes, Dirk",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:26 +0200",
  Publisher     = "Springer Science+Business Media, LLC",
  Title         = "Finite Automata, Their Algebras and Grammars - Towards a Theory of Formal Expressions",
  Year          = "1989",
  File          = "Finite Automata, Their Algebras and Grammars - Towards a Theory of Formal Expressions - Büchi (0) (0) - a - a.pdf"
}

@Book{ Buchic, Author = {B{\"u}chi, Richard}, Editor = "Siefkes, Dirk", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:26 +0200", Publisher = "Springer Science+Business Media, LLC", Title = "Finite Automata, Their Algebras and Grammars - Towards a Theory of Formal Expressions", Year = "1989", File = "Finite Automata, Their Algebras and Grammars - Towards a Theory of Formal Expressions - Büchi (0) (0) - a - a.pdf" }