@book { DiplomatischesProtokollversusCorporateProtocol,
    title = "Diplomatisches Protokoll versus Corporate Protocol",
    author = "Olaf {Jelinski}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b11398",
    url = "https://www.peterlang.com/document/1110037"
}