@article{JRAM_1966__222_150733,
     author = {S. Chowla},
     title = {Some problems of elementary number theory.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {71--74},
     publisher = {mathdoc},
     volume = {222},
     year = {1966},
     zbl = {0136.02805},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1966__222_150733/}
}