@book { FrheschulischeAuslese,
    title = "Frühe schulische Auslese",
    subtitle = "Herausgegeben von Richard Olechowski und Elisabeth Persy",
    author = "Richard {Olechowski} and Elisabeth {Persy}",
    year = "1993",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1080969"
}