@article{10_14708_wm_v1i2_2815,
     author = {S. Drobot and Jan Mikusi\'nski},
     title = {Rachunek operator\'ow},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 263--270},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {1956},
     doi = {10.14708/wm.v1i2.2815},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v1i2.2815/}
}