@misc{Volterra_Vito_(1860–1940)_Enrico_[1920],
 author={Volterra, Vito (1860–1940)},
 volume={Vol. 3, 1900-1913},
 copyright={Public Domain},
 journal={Opere matematiche : memorie e note / Vito Volterra},
 address={Roma},
 howpublished={online},
 year={[1920]},
 publisher={Accademia Nazionale dei Lincei},
 language={ita},
 type={Text},
 title={Enrico Poncare},
 URL={http://www.rcin.org.pl/Content/186862/PDF/WA35_218534_11086-3_39.pdf},
}