%0 Journal Article %A Byleen, Karl %T Embedding any countable semigroup without idempotents in a 2-generated simple semigroup without idempotents %J Glasgow mathematical journal %D 1988 %P 121-128 %V 30 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007126/ %R 10.1017/S0017089500007126 %F 10_1017_S0017089500007126