@misc{Vitali_Giuseppe_(1875–1932)_Sopra_1929,
 author={Vitali, Giuseppe (1875–1932)},
 editor={Polskie Towarzystwo Matematyczne},
 copyright={Public Domain},
 address={Cracov},
 journal={Annales de la Société Polonaise de Mathématique},
 journal={Rocznik Polskiego Towarzystwa Matematycznego},
 howpublished={online},
 year={1929},
 publisher={[s.n.]},
 language={ita},
 language={ita},
 title={Sopra alcuni invarianti associati ad una varietà e sopra i sistemi principali di normali delle superficie},
 type={Text},
 URL={http://rcin.org.pl/Content/18310/PDF/WA35_36541_cz159-r1928-T7_Annales-art-3.pdf},
}