@article{700948,
     title = {Basic sequences and reflexivity of Banach spaces},
     booktitle = {General Topology and its Relations to Modern Analysis and Algebra},
     series = {GDML\_Books},
     publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1962},
     pages = {[331]-332},
     mrnumber = {MR0146635},
     zbl = {0114.30902},
     url = {http://dml.mathdoc.fr/item/700948}
}

Singer, I. Basic sequences and reflexivity of Banach spaces, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1962), pp. [331]-332. http://gdmltest.u-ga.fr/item/700948/