@book { VirtualReality,
    title = "Virtual Reality",
    author = "Alexander {Riegler} and Markus {Peschl} and Karl {Edlinger} and Günther {Fleck}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092389"
}