%0 Journal Article %A Hansoul, Georges %T Boolean algebras with a unary operator %J Czechoslovak Mathematical Journal %D 1986 %P 232-237 %V 36 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1986.102087/ %R 10.21136/CMJ.1986.102087 %G en %F 10_21136_CMJ_1986_102087