@article{RO_1970__4_3_3_0,
     author = {Ullmo, J.},
     title = {La {R.O.} \`a {l'X}},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {3--4},
     publisher = {EDP-Sciences},
     volume = {4},
     number = {V3},
     year = {1970},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/RO_1970__4_3_3_0/}
}