@misc{Bartel_Kazimierz_(1882–1941)_E._1912,
 author={Bartel, Kazimierz (1882–1941)},
 volume={I},
 editor={Kalinowski, Stanisław (1873–1946)},
 number={9},
 copyright={Public Domain},
 journal={Wektor : czasopismo matematyczno-fizyczne},
 address={Warszawa},
 howpublished={online},
 year={1912},
 publisher={Drukarnia Naukowa},
 publisher={Stanisław Kalinowski},
 language={pol},
 title={E. Müller: Der Unterricht in der darstellenden Geometrie an den technischen Hochschulen},
 type={Text},
 URL={http://www.rcin.org.pl/impan/Content/115134/PDF/WA35_141713_P261_Muller-Unterricht.pdf},
}