@misc{Kirchhoff_Gustav_Robert_(1824–1887)_Vorlesungen_1876,
 author={Kirchhoff, Gustav Robert (1824–1887)},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1876},
 publisher={B. G. Teubner},
 language={ger},
 type={Text},
 title={Vorlesungen über Mechanik},
 title={Mechanik},
 URL={http://rcin.org.pl/impan/Content/77882/PDF/WA35_3306_6674_Vorlesungen.pdf},
}