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@Book{            AusielloMarchetti-SpaccamelaCrescenziGambosiProtrasiKann,
  Author        = "Ausiello, Giorgio and Marchetti-Spaccamela, Alberto and Crescenzi, Pierluigi and Gambosi, Giorgio and Protrasi, Marto and Kann, Viggo",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:27 +0200",
  Keywords      = "computational complexity",
  Title         = "Complexity and Approximation",
  File          = "Complexity and Approximation - Ausiello, Marchetti-Spaccamela, Crescenzi, Gambosi, Protrasi, Kann (0) (0) - a - a.pdf"
}

@Book{ AusielloMarchetti-SpaccamelaCrescenziGambosiProtrasiKann, Author = "Ausiello, Giorgio and Marchetti-Spaccamela, Alberto and Crescenzi, Pierluigi and Gambosi, Giorgio and Protrasi, Marto and Kann, Viggo", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:27 +0200", Keywords = "computational complexity", Title = "Complexity and Approximation", File = "Complexity and Approximation - Ausiello, Marchetti-Spaccamela, Crescenzi, Gambosi, Protrasi, Kann (0) (0) - a - a.pdf" }