@book { DasVerhaltenbetrieblicherSysteme,
    title = "Das Verhalten betrieblicher Systeme",
    author = "Hans Rolf {Schaeckert}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1071782"
}