@misc{Plassmann_Joseph_Untersuchungen_1904,
 author={Plassmann, Joseph},
 address={Münster i. W.},
 howpublished={online},
 year={1904},
 publisher={Aschendorffschen Buchhandlung},
 language={ger},
 title={Untersuchungen über den Lichtwechsel des Granatsterns µ Cephei},
 keywords={star Mi Cephei, brightness variability of Mi Cephei},
}