@article{PMF_1910_21_1_a4,
     author = {Axer, A.},
     title = {Przyczynek do charakterystyki funkcyi idea{\l}owej \ensuremath{\varphi}(r)},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {37--41},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1910},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1910_21_1_a4/}
}