@article{M2AN_1970__4_3_131_0,
     author = {Baranger, J.},
     title = {Br\`eve communication. {Un} th\'eor\`eme de caract\'erisation de certains sous-espaces hilbertiens de $l_1$},
     journal = {Revue fran\c{c}aise d'informatique et de recherche op\'erationnelle. S\'erie rouge},
     pages = {131--134},
     publisher = {Dunod},
     address = {Paris},
     volume = {4},
     number = {R3},
     year = {1970},
     mrnumber = {298390},
     zbl = {0213.12601},
     language = {fr},
     url = {http://archive.numdam.org/item/M2AN_1970__4_3_131_0/}
}