%0 Journal Article
%A T. Saito
%T Products of four idempotents in finite full transformation semigroups.
%J Semigroup forum
%D 1989
%P 179-194
%V 39
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1989__39_2_134985/
%F SF_1989__39_2_134985