@book { StraeinsAll33EinRaumschiffnamensExcalibur,
    title = "Straße ins All 33: Ein Raumschiff namens Excalibur",
    author = "Wilfried A. {Hary} and Werner K. {Giesa}",
    year = "2021",
    publisher = "Uksak E-Books",
    address = "Lengerich, Germany",
    url = "https://uksakebooks.grin.com/document/1003451"
}