@misc{Betti_Enrico_(1823–1892)_Sopra_[1871],
 author={Betti, Enrico (1823–1892)},
 copyright={Public Domain},
 address={[Bologna]},
 howpublished={online},
 year={[1871]},
 language={ita},
 title={Sopra gli spazi di un numero qualunque di dimensioni},
 type={Text},
 URL={http://www.rcin.org.pl/Content/35231/PDF/WA35_18220_7084_Sopra-gli-spazi.pdf},
}