@book { SchreibundTextroutinen,
    title = "Schreib- und Textroutinen",
    author = "Helmuth {Feilke} and Katrin {Lehnen}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01844-8",
    url = "https://www.peterlang.com/document/1044664"
}