@article{CG_1990___5_26_0,
     author = {Guillop\'e, Laurent},
     title = {Sur les codes \`a barre {EAN}},
     journal = {Cahiers GUTenberg},
     pages = {26--29},
     publisher = {Association GUTenberg},
     number = {5},
     year = {1990},
     language = {fr},
     url = {http://archive.numdam.org/item/CG_1990___5_26_0/}
}