@article{10_1007_s10587_013_0015_3,
     author = {C\'uth, Marek and Rmoutil, Martin},
     title = {$\sigma $-porosity is separably determined},
     journal = {Czechoslovak Mathematical Journal},
     pages = {219--234},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {2013},
     doi = {10.1007/s10587-013-0015-3},
     mrnumber = {3035508},
     zbl = {1274.54093},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-013-0015-3/}
}