@book { Communicationmatters,
    title = "Communication matters –",
    subtitle = "Benutzerbilder von Softwareentwicklern",
    author = "Uwe {Röther}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095864"
}