@article{MSH_1994__128__15_0,
     author = {Calmes, Jean},
     title = {Structures naturelles des demi-groupes et des anneaux r\'eguliers ou involut\'es},
     journal = {Math\'ematiques informatique et sciences humaines},
     pages = {15--39},
     publisher = {Ecole des hautes-\'etudes en sciences sociales},
     volume = {128},
     year = {1994},
     mrnumber = {1329054},
     zbl = {0828.20058},
     language = {fr},
     url = {http://archive.numdam.org/item/MSH_1994__128__15_0/}
}