@article{MSH_1977__57__27_0,
     author = {Eytan, M.},
     title = {Logique modale propositionnelle : une vue cavali\`ere},
     journal = {Math\'ematiques et sciences humaines},
     pages = {27--42},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {57},
     year = {1977},
     mrnumber = {450010},
     zbl = {0374.02012},
     language = {fr},
     url = {http://archive.numdam.org/item/MSH_1977__57__27_0/}
}