@article{JRAM_1972__255_151242,
     author = {Manuel Valdivia},
     title = {Some criteria for weak compactness.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {165--169},
     publisher = {mathdoc},
     volume = {255},
     year = {1972},
     zbl = {0239.46001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__255_151242/}
}