@article{CMUC_2001__42_1_a15,
     author = {Shishkov, Ivailo},
     title = {$\Sigma$-products and selections of set-valued mappings},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {203--207},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {2001},
     mrnumber = {1825384},
     zbl = {1053.54029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2001__42_1_a15/}
}