@article{10_14708_ma_v47i1_6509,
     author = {Krzysztof J. Szajowski},
     title = {Cover of {Special} {Chapter}},
     journal = {Mathematica Applicanda},
     pages = { i--ii},
     publisher = {mathdoc},
     volume = {47},
     number = {1},
     year = {2019},
     doi = {10.14708/ma.v47i1.6509},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v47i1.6509/}
}