@TechReport{Nagl05,
  author      = "Manfred Nagl",
  title       = "Process Interaction Diagrams are more than Process Chains or Transport Networks",
  institution = "RWTH Aachen",
  keywords    = "process modeling, dependency relations between subprocesses, different aspects of a process, interaction of different processes, applications in different engineering disciplines",
  year        = "2021",
  number      = "AIB-2021-05",
  month       = feb,
  url         = "http://publications.rwth-aachen.de/record/814376/files/814376.pdf"
}