@article{PMF_1908_19_1_a5,
     author = {Axer, A.},
     title = {O uk{\l}adach si{\l} wewn\k{e}trznych z si{\l}o\'srodem},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {99--122},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1908},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1908_19_1_a5/}
}