%0 Journal Article %A Drensky, Vesselin %A Hammoudi, Lakhdar %T Combinatorics of Words and Semigroup Algebras Which Are Sums of Locally Nilpotent Subalgebras %J Canadian mathematical bulletin %D 2004 %P 343-353 %V 47 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2004-033-2/ %R 10.4153/CMB-2004-033-2 %F 10_4153_CMB_2004_033_2