@article{MSH_1969__26__51_0,
     author = {Leclerc, B. and Monjardet, B.},
     title = {Probl\`emes ouverts. {Repr\'esentation} graphique d'un graphe},
     journal = {Math\'ematiques et sciences humaines},
     pages = {51--57},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {26},
     year = {1969},
     zbl = {0207.54902},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1969__26__51_0/}
}