@book { InternationaleUnternehmensbesteuerung,
    title = "Internationale Unternehmensbesteuerung",
    author = "Jörg {Weltin}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13987",
    url = "https://www.peterlang.com/document/1068524"
}