@book { EineempirischeUntersuchungdesValueInvestings,
    title = "Eine empirische Untersuchung des Value Investings",
    author = "Michael {Roth}",
    year = "2015",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/300000"
}