@book { AbenteuerCyberspace,
    title = "Abenteuer Cyberspace",
    author = "Angela {Tillmann} and Ralf {Vollbrecht}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100978"
}