@book { EnvisioningTeleCity,
    title = "Envisioning TeleCity",
    subtitle = "Towards the Urbanisation of ICT",
    author = "Frank {Helten} and Bernd {Fischer}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095904"
}