@article{BUMI_1958_3_13_1_a5,
     author = {Arrighi, Gino},
     title = {Considerazioni sulle serie $\sum_{s=1}^{\infty}  P_{s}(t)e^{\rho_s t}$.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {38--45},
     publisher = {mathdoc},
     volume = {Ser. 3, 13},
     number = {1},
     year = {1958},
     zbl = {0085.28701},
     mrnumber = {98263},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1958_3_13_1_a5/}
}