@book { LernenundLehrenfrEuropa,
    title = "Lernen und Lehren für Europa",
    subtitle = "Festschrift für Waltraut Schöler",
    author = "Alfons {Tuyaerts} and W. {Hagemann} and G. {Tulodziecki}",
    year = "1998",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086664"
}