@article{10_21136_CMJ_1992_128319,
     author = {John, Kamil},
     title = {On the uncomplemented subspace $K(X,Y)$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {167--173},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {1992},
     doi = {10.21136/CMJ.1992.128319},
     mrnumber = {1152178},
     zbl = {0776.46016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128319/}
}