@book { DemonsMediatorsbetweenThisWorldandtheOther,
    title = "Demons: Mediators between This World and the Other",
    author = "Ruth {Petzoldt} and Paul {Neubauer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086662"
}