@book { DaskommunaleMarktwesen,
    title = "Das kommunale Marktwesen",
    author = "Eva {Meiers}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05698-3",
    url = "https://www.peterlang.com/document/1049493"
}