@book { DieAtterseeGruppe,
    title = "Die Attersee-Gruppe",
    author = "Ernst {Probst}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656081562",
    url = "https://www.hausarbeiten.de/document/183091"
}