@misc{Levi-Civita_Tullio_(1873–1941)_Complementi_1954,
 author={Levi-Civita, Tullio (1873–1941) and Nicola Zanichelli Editore. and Accademia nazionale dei Lincei.},
 address={Bologna},
 howpublished={online},
 year={1954},
 publisher={Nicola Zanichelli Editore},
 language={ita},
 title={Complementi al teorema di Malus-Dupin: Nota II. Ibidem, pp. 237-245},
 type={Text},
 URL={http://www.rcin.org.pl/Content/153676/PDF/WA35_186574_11273-1_Art32.pdf},
}