@book { KonfliktundKooperation,
    title = "Konflikt und Kooperation",
    author = "Martin {Göllnitz} and Nils {Abraham} and Thomas {Wegener Friis} and Helmut {Müller-Enbergs}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15439",
    url = "https://www.peterlang.com/document/1110876"
}