@article{JRAM_1972__256_151258,
     author = {Manuel Valdivia},
     title = {On subspaces of countable codimension of a locally convex space.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {185--189},
     publisher = {mathdoc},
     volume = {256},
     year = {1972},
     zbl = {0239.46002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__256_151258/}
}