@article{MZ_1929__30_168151,
     author = {V. Jarnik},
     title = {\"Uber {Gitterpunkte} in mehrdimensionalen {Kugeln}},
     journal = {Mathematische Zeitschrift},
     pages = {768--786},
     year = {1929},
     volume = {30},
     zbl = {55.0111.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1929__30_168151/}
}