@article{JMPA_1950_9_29__245_0,
     author = {Berge, Claude},
     title = {Sur un nouveau calcul symbolique et ses applications},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {245--274},
     volume = {9e s{\'e}rie, 29},
     year = {1950},
     mrnumber = {38480},
     zbl = {0038.27001},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1950_9_29__245_0/}
}