@book { DiezwischenbetrieblicheKooperation,
    title = "Die zwischenbetriebliche Kooperation",
    author = "Eva {Thelen}",
    year = "1994",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1081832"
}