@book { Raum,
    title = "Raum",
    author = "Ulrich {Beuttler} and Markus {Mühling} and Martin {Rothgangel}",
    year = "2022",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b20086",
    url = "https://www.peterlang.com/document/1289414"
}