@book { DieSocietasPrivataEuropaeainderKrise,
    title = "Die Societas Privata Europaea in der Krise",
    author = "Johannes {Culmann}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01565-2",
    url = "https://www.peterlang.com/document/1046698"
}