@article{CMH_1955__29_139092,
     author = {Jean-Pierre Serre},
     title = {Un th\'eor\`eme de dualit\'e.},
     journal = {Commentarii mathematici Helvetici},
     pages = {9--26},
     publisher = {mathdoc},
     volume = {29},
     year = {1955},
     zbl = {0067.16101},
     url = {http://geodesic.mathdoc.fr/item/CMH_1955__29_139092/}
}