@book { Orthographieerwerb,
    title = "Orthographieerwerb",
    subtitle = "Qualitative Fehleranalysen zum Aufbau der orthographischen Kompetenz",
    author = "Günther {Thomé}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1087303"
}