@Unpublished{     EGF,
  Author        = "unknown",
  date-added    = "2023-03-13 15:26:22 +0100",
  date-modified = "2023-03-13 15:53:19 +0100",
  Title         = "Introduction to Exponential Generating Functions",
  File          = "Introduction to Exponential Generating Functions.pdf"
}

@Unpublished{ EGF, Author = "unknown", date-added = "2023-03-13 15:26:22 +0100", date-modified = "2023-03-13 15:53:19 +0100", Title = "Introduction to Exponential Generating Functions", File = "Introduction to Exponential Generating Functions.pdf" }