@article{PMS_1928_3_1_a5,
     author = {Smoluchowski, Marian},
     title = {Liczba i wielko\'s\'c cz\k{a}stek i atom\'ow},
     journal = {Pisma Mariana Smoluchowskiego},
     pages = {43--59},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1928},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMS_1928_3_1_a5/}
}