Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1965_162_3_a9, author = {M. A. Spivak}, title = {The decomposition of regular expressions in terms of a basis, and its applications}, journal = {Doklady Akademii Nauk}, pages = {520--522}, publisher = {mathdoc}, volume = {162}, number = {3}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_162_3_a9/} }
M. A. Spivak. The decomposition of regular expressions in terms of a basis, and its applications. Doklady Akademii Nauk, Tome 162 (1965) no. 3, pp. 520-522. http://geodesic.mathdoc.fr/item/DAN_1965_162_3_a9/