@article{10_14708_wm_v18i01_3201,
     author = {J. Onyszkiewicz},
     title = {Semestr logiczny},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 211--214},
     publisher = {mathdoc},
     volume = {18},
     number = {01},
     year = {1974},
     doi = {10.14708/wm.v18i01.3201},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v18i01.3201/}
}