@article{GDZPPN001255274, title = {Semisimplicity of the algebra associated to a biprefix code.}, journal = {Semigroup forum}, volume = {23}, year = {1981}, pages = {327-342}, zbl = {0481.68076}, url = {http://dml.mathdoc.fr/item/GDZPPN001255274} }
Reutenauer, C. Semisimplicity of the algebra associated to a biprefix code.. Semigroup forum, Tome 23 (1981) pp. 327-342. http://gdmltest.u-ga.fr/item/GDZPPN001255274/