%0 Journal Article %A Satyanarayana, M. %T Commutative primary semigroups %J Czechoslovak Mathematical Journal %D 1972 %P 509-516 %V 22 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1972.101121/ %R 10.21136/CMJ.1972.101121 %G en %F 10_21136_CMJ_1972_101121