@InProceedings{   gessel,
  Author        = "Gessel, Ira M.",
  BookTitle     = "Enumeration and design",
  date-added    = "2023-08-26 09:24:07 +0200",
  date-modified = "2023-08-26 09:25:01 +0200",
  Pages         = "157--197",
  Publisher     = "Academic Press London",
  Title         = "Combinatorial Proofs of Congruences",
  Year          = "1984",
  File          = "Combinatorial Proofs of Congruences - combinatorial-congruences.pdf",
  file-2        = "Combinatorial Proofs of Congruences.pdf",
  file-3        = "Combinatorial Proofs of Congruences - comb-cong.pdf"
}

@InProceedings{ gessel, Author = "Gessel, Ira M.", BookTitle = "Enumeration and design", date-added = "2023-08-26 09:24:07 +0200", date-modified = "2023-08-26 09:25:01 +0200", Pages = "157--197", Publisher = "Academic Press London", Title = "Combinatorial Proofs of Congruences", Year = "1984", File = "Combinatorial Proofs of Congruences - combinatorial-congruences.pdf", file-2 = "Combinatorial Proofs of Congruences.pdf", file-3 = "Combinatorial Proofs of Congruences - comb-cong.pdf" }