@article{10_14708_wm_v20i02_3569,
     author = {. .},
     title = {Spis tre\'sci tom\'ow {XI} {\textendash} {XX}},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 231--247},
     publisher = {mathdoc},
     volume = {20},
     number = {02},
     year = {1978},
     doi = {10.14708/wm.v20i02.3569},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v20i02.3569/}
}