@book { BedeutungderSeniorengenerationfrdenEinzelhandel,
    title = "Bedeutung der Seniorengeneration für den Einzelhandel",
    author = "Ruslan {Fedorow}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836646635",
    url = "https://m.diplom.de/document/227777"
}