@article{MSH_1970__31__5_0,
     author = {Lentin, A.},
     title = {\'Equations dans les mono{\"\i}des libres},
     journal = {Math\'ematiques et sciences humaines},
     pages = {5--16},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {31},
     year = {1970},
     mrnumber = {285641},
     zbl = {0265.20048},
     language = {fr},
     url = {http://archive.numdam.org/item/MSH_1970__31__5_0/}
}