@book { ApproachestotheExarteEvaluationofInformationSystems,
    title = "Approaches to the Ex-arte Evaluation of Information Systems",
    subtitle = "A critical Review",
    author = "Sascha {Walter}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832470272",
    url = "https://m.diplom.de/document/222336"
}