@PhdThesis{       Petri:PhD:1962,
  Author        = "Petri, Carl Adam",
  date-added    = "2015-03-26 16:01:51 +0000",
  date-modified = "2015-03-26 17:32:25 +0000",
  School        = "University of Bonn",
  Title         = "Kommunikation mit Automaten",
  Year          = "1962",
  File          = "Kommunikation mit Automaten - Petri (0) (0) - a - a - j.pdf",
  file-2        = "Kommunikation mit Automaten - Petri (1) (0) - a - a - j.pdf"
}

@PhdThesis{ Petri:PhD:1962, Author = "Petri, Carl Adam", date-added = "2015-03-26 16:01:51 +0000", date-modified = "2015-03-26 17:32:25 +0000", School = "University of Bonn", Title = "Kommunikation mit Automaten", Year = "1962", File = "Kommunikation mit Automaten - Petri (0) (0) - a - a - j.pdf", file-2 = "Kommunikation mit Automaten - Petri (1) (0) - a - a - j.pdf" }