@book { ZurDefinitionIdentifikationundAnalysevonProzesystemen,
    title = "Zur Definition, Identifikation und Analyse von Prozeßsystemen",
    author = "Olaf {Werner}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832406530",
    url = "https://m.diplom.de/document/216583"
}