@article{MZ_1930__31_168164,
     author = {E. Landau},
     title = {Zum {Waringschen} {Problem.} {Zweite} {Abhandlung}},
     journal = {Mathematische Zeitschrift},
     pages = {149--150},
     publisher = {mathdoc},
     volume = {31},
     year = {1930},
     zbl = {55.0109.03},
     url = {http://geodesic.mathdoc.fr/item/MZ_1930__31_168164/}
}