@book { QuotaleGesellschafterhaftung,
    title = "Quotale Gesellschafterhaftung",
    author = "Katharina {Engels}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03394-6",
    url = "https://www.peterlang.com/document/1046591"
}