@book { StammestrachtalsGruppenstil,
    title = "Stammestracht als Gruppenstil",
    author = "Petra {Steinle}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832434632",
    url = "https://m.diplom.de/document/219130"
}