@book { Produktbezogenekobilanzen,
    title = "Produktbezogene Ökobilanzen",
    author = "Franziska {Rabl}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832439637",
    url = "https://m.diplom.de/document/219601"
}