%0 Journal Article
%A K. Todorov
%A B. Bijev
%T Idempotent-generated subsemigroups of the symmetric semigroup of degree four: computer investigations.
%J Semigroup forum
%D 1985
%P 119-122
%V 31
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1985__31_134740/
%F SF_1985__31_134740