@book { AngriffausderRaumzeit,
    title = "Angriff aus der Raumzeit",
    author = "Alfred {Bekker} and Conrad {Shepherd}",
    year = "2019",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/434669"
}