@book { Konsumentenpreiswissen,
    title = "Konsumentenpreiswissen",
    author = "Christian {Idinger}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02531-6",
    url = "https://www.peterlang.com/document/1067465"
}