@book { UntersuchungsundRgeobliegenheitenimUNKaufrecht,
    title = "Untersuchungs- und Rügeobliegenheiten im UN-Kaufrecht",
    author = "Wajma {Mangal}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05791-1",
    url = "https://www.peterlang.com/document/1049531"
}