@article{10_21136_CMJ_1959_100359,
     author = {Pt\'ak, Vlastimil},
     title = {Biorthogonal systems and reflexivity of {Banach} spaces},
     journal = {Czechoslovak Mathematical Journal},
     pages = {319--326},
     publisher = {mathdoc},
     volume = {09},
     number = {3},
     year = {1959},
     doi = {10.21136/CMJ.1959.100359},
     mrnumber = {0110008},
     zbl = {0114.30901},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1959.100359/}
}