%0 Journal Article %A Chacrono, M. %A Thierrin, G. %T σ-Reflexive Semigroups and Rings %J Canadian mathematical bulletin %D 1972 %P 185-188 %V 15 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-033-3/ %R 10.4153/CMB-1972-033-3 %F 10_4153_CMB_1972_033_3