@article{PORMA_1993__50_3_115689,
     author = {Othman, Echi},
     title = {C-anneaux, {E-anneaux} et formule de la dimension},
     journal = {Portugaliae mathematica},
     pages = {277--295},
     publisher = {mathdoc},
     volume = {50},
     number = {3},
     year = {1993},
     mrnumber = {1244507},
     zbl = {0828.13009},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1993__50_3_115689/}
}