@article{BUMI_1957_3_12_2_a16,
     author = {Vaghi, Carla},
     title = {Energia di campi spazio-temporali emisimmetrici.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {264--268},
     publisher = {mathdoc},
     volume = {Ser. 3, 12},
     number = {2},
     year = {1957},
     zbl = {0085.20706},
     mrnumber = {91161},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1957_3_12_2_a16/}
}