Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1993_32_2_a3, author = {N. A. Peryazev}, title = {Positive theories of free monoids}, journal = {Algebra i logika}, pages = {148--159}, publisher = {mathdoc}, volume = {32}, number = {2}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1993_32_2_a3/} }
N. A. Peryazev. Positive theories of free monoids. Algebra i logika, Tome 32 (1993) no. 2, pp. 148-159. http://geodesic.mathdoc.fr/item/AL_1993_32_2_a3/