@book { EntwicklungenimWeb20,
    title = "Entwicklungen im Web 2.0",
    author = "Torsten {Siever} and Peter {Schlobinski}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02039-7",
    url = "https://www.peterlang.com/document/1044413"
}