@article{JRAM_1979__305_152078,
     author = {M. Valdivia},
     title = {Solution of a problem of {Grothendieck.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {116--121},
     publisher = {mathdoc},
     volume = {305},
     year = {1979},
     zbl = {0392.46048},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__305_152078/}
}