@book { DieGmbHinderKrise,
    title = "Die GmbH in der Krise",
    author = "Timo {Wanner}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05231-2",
    url = "https://www.peterlang.com/document/1049281"
}