@article{10_21136_CMJ_1989_102305,
     author = {Sickel, Winfried},
     title = {On boundedness of superposition operators in spaces of {Triebel-Lizorkin} type},
     journal = {Czechoslovak Mathematical Journal},
     pages = {323--347},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     doi = {10.21136/CMJ.1989.102305},
     mrnumber = {992137},
     zbl = {0693.46039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102305/}
}