@article{10_14708_cm_v45i2_5202,
     author = {Iwo Labuda},
     title = {Boundaries of upper semicontinuous set valued maps},
     journal = {Commentationes Mathematicae},
     pages = { 225--235},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {2005},
     doi = {10.14708/cm.v45i2.5202},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v45i2.5202/}
}