@book { StadtundRegionalplanungvorneuenHerausforderungen,
    title = "Stadt- und Regionalplanung vor neuen Herausforderungen",
    author = "Stephan {Mitschang}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103404"
}