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@Book{            walicki,
  Author        = "Walicki, Micha{\l}",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:26 +0200",
  Publisher     = "World Scientific",
  Title         = "Logic",
  Year          = "2011",
  File          = "Logic - inf227 - a - a.pdf"
}

@Book{ walicki, Author = "Walicki, Micha{\l}", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:26 +0200", Publisher = "World Scientific", Title = "Logic", Year = "2011", File = "Logic - inf227 - a - a.pdf" }