@article{MSH_1977__56__63_0,
     author = {Comyn, G. and Van Dorpe, J. Cl.},
     title = {Valuation et semi-modularit\'e dans les demi-treillis},
     journal = {Math\'ematiques et sciences humaines},
     pages = {63--75},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {56},
     year = {1977},
     mrnumber = {444542},
     zbl = {0367.06009},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1977__56__63_0/}
}