@misc{Müller-Faust2023,
    author={Müller-Faust, Johannes},
    title={Der Kreis},
    series={Primärquellen der Mathematik;},
    pages={1 S.},
    month={01},
    year={2023},
    publisher={Privat},
    school={Hochschule RheinMain, Wiesbaden},
    url={https://hlbrm.pur.hebis.de/xmlui/handle/123456789/116},
    doi={10.25716/pur-94}
}