@book { NichtparametrischeAnalysevonBildungsertragsraten,
    title = "Nichtparametrische Analyse von Bildungsertragsraten",
    author = "Steffen {Wirth}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13992",
    url = "https://www.peterlang.com/document/1144494"
}