@article{ITA_1981__15_3_233_0, author = {Brandstadt, Andreas}, title = {Closure properties of certain families of formal languages with respect to a generalization of cyclic closure}, journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications}, volume = {15}, year = {1981}, pages = {233-252}, mrnumber = {630064}, zbl = {0467.68066}, language = {en}, url = {http://dml.mathdoc.fr/item/ITA_1981__15_3_233_0} }
Brandstadt, Andreas. Closure properties of certain families of formal languages with respect to a generalization of cyclic closure. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 15 (1981) pp. 233-252. http://gdmltest.u-ga.fr/item/ITA_1981__15_3_233_0/
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