@book{402429, title = {Geometria proiettiva differenziale. I}, series = {GDML\_Books}, publisher = {Zanichelli, Nicola}, address = {Bologna}, year = {1926}, zbl = {02588323}, language = {it}, url = {http://dml.mathdoc.fr/item/402429} }
Fubini, Guido; Čech, Eduard. Geometria proiettiva differenziale. I. GDML_Books (1926), http://gdmltest.u-ga.fr/item/402429/