@article{10_21136_CMJ_1990_102358,
     author = {\v{S}eda, Valter},
     title = {Surjectivity of an operator},
     journal = {Czechoslovak Mathematical Journal},
     pages = {46--63},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1990},
     doi = {10.21136/CMJ.1990.102358},
     mrnumber = {1037350},
     zbl = {0739.47030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102358/}
}