@book { MarktundMarketingfrHeuundStrohpressen,
    title = "Markt und Marketing für Heu- und Strohpressen",
    author = "Hans-Christian {Heyne}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832423742",
    url = "https://m.diplom.de/document/218188"
}