@article{BUMI_1956_3_11_3_a21,
     author = {Perna, Alfredo},
     title = {Ricordo di {Ernesto} {Ces\`aro} (1859--1906).},
     journal = {Bollettino della Unione matematica italiana},
     pages = {457--468},
     publisher = {mathdoc},
     volume = {Ser. 3, 11},
     number = {3},
     year = {1956},
     zbl = {0071.00310},
     mrnumber = {82436},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1956_3_11_3_a21/}
}