@book { BestandundWandeldesVlkerrechts,
    title = "Bestand und Wandel des Völkerrechts",
    author = "Wolfgang {Benedek} and Hans-Peter {Folz} and Hubert {Isak} and Matthias C. {Kettemann}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03764-7",
    url = "https://www.peterlang.com/document/1047909"
}