@book { Wegzugsbesteuerungnach6AStG,
    title = "Wegzugsbesteuerung nach § 6 AStG",
    author = "Jens {Kalbitzer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108966"
}