@book { TheSwissPoliticalSystemandLocalGovernment,
    title = "The Swiss Political System and Local Government",
    author = "Michael {Sell} and Meike {Gugel}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638228855",
    url = "https://www.hausarbeiten.de/document/18563"
}