@article{10_14708_wm_v33i01_4670,
     author = {Z. Marciniak},
     title = {Jedno\'sci w pier\'scieniach grupowych},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 47--51},
     publisher = {mathdoc},
     volume = {33},
     number = {01},
     year = {1997},
     doi = {10.14708/wm.v33i01.4670},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v33i01.4670/}
}