@article{CRMATH_2004__338_3_223_0,
     author = {Raynaud, Michel},
     title = {Groupes vectoriels et sch\'ema de {Picard}},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {223--227},
     publisher = {Elsevier},
     volume = {338},
     number = {3},
     year = {2004},
     doi = {10.1016/j.crma.2003.12.005},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2003.12.005/}
}