@article{10_14708_wm_v29i02_4478,
     author = {A. Pe{\l}czy\'nski},
     title = {Jeszcze jeden dow\'od nier\'owno\'sci o \'srednich},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 223--224},
     publisher = {mathdoc},
     volume = {29},
     number = {02},
     year = {1992},
     doi = {10.14708/wm.v29i02.4478},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v29i02.4478/}
}