@article{10_14708_wm_v20i01_3448,
     author = {. .},
     title = {Ksi\k{a}\.zki nades{\l}ane},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 139},
     publisher = {mathdoc},
     volume = {20},
     number = {01},
     year = {1976},
     doi = {10.14708/wm.v20i01.3448},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v20i01.3448/}
}