@article{PMF_1931_38_1_a1,
     author = {Wigert, S.},
     title = {Note sur deux fonctions arithm\'etiques},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {23--29},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {1931},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PMF_1931_38_1_a1/}
}