@article{BUMI_1949_3_4_2_a2,
     author = {Marcus, F.},
     title = {Un teorema di geometria differenziale},
     journal = {Bollettino della Unione matematica italiana},
     pages = {109--111},
     publisher = {mathdoc},
     volume = {Ser. 3, 4},
     number = {2},
     year = {1949},
     zbl = {0034.38802},
     mrnumber = {33122},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1949_3_4_2_a2/}
}