@book { DiscountCertificatesAnAlternativetoStockInvestments,
    title = "Discount Certificates: An Alternative to Stock Investments",
    author = "Roman {Schmidt}",
    year = "2011",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296461"
}