@article{MZ_1936__40_168625,
     author = {I. Chowla},
     title = {Some problems of {Waring?s} type},
     journal = {Mathematische Zeitschrift},
     pages = {506--508},
     publisher = {mathdoc},
     volume = {40},
     year = {1936},
     zbl = {0012.29101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1936__40_168625/}
}