@misc{Vitali_Giuseppe_(1875–1932)_Geometria_1929,
 author={Vitali, Giuseppe (1875–1932)},
 copyright={Public Domain},
 address={Bologna},
 howpublished={online},
 year={1929},
 publisher={Nicola Zanichelli},
 language={ita},
 type={Text},
 title={Geometria nello spazio hilbertiano},
 URL={http://www.rcin.org.pl/impan/Content/67703/PDF/WA35_6792_4244_Geometria-nello.pdf},
}