@book { DasWesenderWirtschaft,
    title = "Das Wesen der Wirtschaft",
    author = "Rudolf {Eder}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01496-9",
    url = "https://www.peterlang.com/document/1044661"
}