@article{MZ_1959__72_183611,
     author = {Arnold Walfisz},
     title = {\"Uber {Gitterpunkte} in vierdimensionalen {Ellipsoiden.}},
     journal = {Mathematische Zeitschrift},
     pages = {259--278},
     year = {1959},
     volume = {72},
     zbl = {0234.10037},
     url = {http://geodesic.mathdoc.fr/item/MZ_1959__72_183611/}
}