@misc{Smith_Charles_(1844–1916)_An_1885,
 author={Smith, Charles (1844–1916)},
 address={London},
 howpublished={online},
 year={1885},
 publisher={Macmillan and Co.},
 language={eng},
 title={An elementary treatise on conic sections},
 type={Text},
 URL={http://rcin.org.pl/Content/81679/PDF/WA35_18287_7129_An-elementary.pdf},
}