@article{MS2_1986__58_166979,
     author = {Iwo Labuda},
     title = {Multi-valued {Namioka} theorems.},
     journal = {Mathematica Scandinavica},
     pages = {227--235},
     publisher = {mathdoc},
     volume = {58},
     year = {1986},
     zbl = {0578.54007},
     url = {http://geodesic.mathdoc.fr/item/MS2_1986__58_166979/}
}