@book { InterkantonalesKonkordatsrecht,
    title = "Interkantonales Konkordatsrecht",
    author = "Hanspeter {Kehrli}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069125"
}