@article{PMF_1898_9_1_a6,
     author = {Zaremba, S.},
     title = {O zasadzie {Dirichleta}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {131--138},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1898},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1898_9_1_a6/}
}