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@article{DAN_1962_147_2_a16, author = {Yu. I. Yanov}, title = {On identical transformations of regular expressions}, journal = {Doklady Akademii Nauk}, pages = {327--330}, publisher = {mathdoc}, volume = {147}, number = {2}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_2_a16/} }
Yu. I. Yanov. On identical transformations of regular expressions. Doklady Akademii Nauk, Tome 147 (1962) no. 2, pp. 327-330. http://geodesic.mathdoc.fr/item/DAN_1962_147_2_a16/