@article{BUMI_1958_3_13_2_a11,
     author = {Blaschke, Wilhelm},
     title = {Sulle geodetiche chiuse.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {240--247},
     publisher = {mathdoc},
     volume = {Ser. 3, 13},
     number = {2},
     year = {1958},
     zbl = {0083.37103},
     mrnumber = {100275},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1958_3_13_2_a11/}
}