@book { SatzungderSocietasPrivataEuropaeaSPE,
    title = "Satzung der Societas Privata Europaea (SPE)",
    author = "Katrin {Flaig}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00111-2",
    url = "https://www.peterlang.com/document/1044652"
}