@book { BehindertentourismusaufderInselSylt,
    title = "Behindertentourismus auf der Insel Sylt",
    subtitle = "Ein unentdecktes Marktsegment?",
    author = "Stephanie {Philipp}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832411572",
    url = "https://m.diplom.de/document/217081"
}