@book { PreisdifferenzierungausKundensicht,
    title = "Preisdifferenzierung aus Kundensicht",
    author = "Rebecca {Winkelmann}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03411-0",
    url = "https://www.peterlang.com/document/1047260"
}