%0 Journal Article %A K. Byleen %T Embedding any countable semigroups in a 2-generated congruence-free semigroup. %J Semigroup forum %D 1990 %P 145-154 %V 41 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1990__41_2_135043/ %F SF_1990__41_2_135043