@book { ImmermannJahrbuch42003,
    title = "Immermann-Jahrbuch 4/2003",
    author = "Wolfgang {Adam} and Peter {Hasubek} and Gunter {Schandera}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094415"
}