@book { EssentialsofFiscalSociology,
    title = "Essentials of Fiscal Sociology",
    author = "Jürgen G. {Backhaus}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02905-5",
    url = "https://www.peterlang.com/document/1045643"
}