@book { StrategischePositionierungvonRetailbankeninDeutschland,
    title = "Strategische Positionierung von Retailbanken in Deutschland",
    author = "Frank {Wegner}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836628471",
    url = "https://m.diplom.de/document/226723"
}