@article{BUMI_1957_3_12_1_a1,
     author = {Wintner, Aurel},
     title = {On stable oscillations of high frequency.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {9--11},
     publisher = {mathdoc},
     volume = {Ser. 3, 12},
     number = {1},
     year = {1957},
     zbl = {0077.08702},
     mrnumber = {87822},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1957_3_12_1_a1/}
}