@article{10_21136_CPM_1985_118238,
     author = {Natkaniec, Tomasz},
     title = {On points of qualitative semicontinuity},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {337--342},
     publisher = {mathdoc},
     volume = {110},
     number = {4},
     year = {1985},
     doi = {10.21136/CPM.1985.118238},
     mrnumber = {820322},
     zbl = {0624.26006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1985.118238/}
}