%0 Journal Article
%A K. Todorov
%T Inverse elements and their average number in a finite symmetric semigroup.
%J Semigroup forum
%D 1979
%P 279-281
%V 18
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1979__18_134357/
%F SF_1979__18_134357