@book { SchweizerischeKirchenrechtsquellenSourcesdudroitecclsialsuisse,
    title = "Schweizerische Kirchenrechtsquellen- Sources du droit ecclésial suisse",
    author = "Jakob {Frey} and Dieter {Kraus}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1106327"
}