@article{BUMI_1949_3_4_4_a7,
     author = {Marchionna, Ermanno},
     title = {Un complemento del teorema dell' $Af+B\varphi$},
     journal = {Bollettino della Unione matematica italiana},
     pages = {368--370},
     publisher = {mathdoc},
     volume = {Ser. 3, 4},
     number = {4},
     year = {1949},
     zbl = {0036.37401},
     mrnumber = {34052},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1949_3_4_4_a7/}
}