@article{BUMI_1928_1_7_2_a8,
     author = {Sbrana, Francesco},
     title = {Sull{\textquoteright}espressione differenziale $X\,dx + Y\,dy + Z\,dz$},
     journal = {Bollettino della Unione matematica italiana},
     pages = {95--98},
     publisher = {mathdoc},
     volume = {Ser. 1, 7},
     number = {2},
     year = {1928},
     zbl = {54.0261.04},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1928_1_7_2_a8/}
}