@book { WorkflowManagementMglichkeitenundGrenzen,
    title = "Workflow-Management: Möglichkeiten und Grenzen",
    author = "Okka {Heuckeroth}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832402938",
    url = "https://m.diplom.de/document/216279"
}