@book { StadtohneReligion,
    title = "Stadt ohne Religion?",
    subtitle = "Zur Veränderung von Religion in Städten – Interdisziplinäre Zugänge",
    author = "Jürgen {Heumann}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099287"
}