@book { FaktorenanalyseoderRaschModell,
    title = "Faktorenanalyse oder Rasch-Modell?",
    author = "Eduard {Brandstätter}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092288"
}