@article{MSH_1983__83__55_0,
     author = {Cartan, E.},
     title = {Plongement d'un groupo{\"\i}de m\'edian dans le groupo{\"\i}de multiplicatif d'un semi-anneau m\'edian},
     journal = {Math\'ematiques et sciences humaines},
     pages = {55--68},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {83},
     year = {1983},
     zbl = {0529.16029},
     language = {fr},
     url = {http://archive.numdam.org/item/MSH_1983__83__55_0/}
}