@article{CMUC_1990__31_3_a14,
     author = {P{\l}uciennik, Ryszard},
     title = {Continuity of superposition operators on $w_0$ and $W_0$},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {529--542},
     publisher = {mathdoc},
     volume = {31},
     number = {3},
     year = {1990},
     mrnumber = {1078487},
     zbl = {0741.47007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1990__31_3_a14/}
}