@article{ITA_1975__9_2_13_0, author = {Ehrenfeucht, A. and Rozenberg, G.}, title = {A pumping theorem for deterministic {ETOL} languages}, journal = {Revue fran\c{c}aise d'automatique informatique recherche op\'erationnelle. Informatique th\'eorique}, pages = {13--23}, publisher = {Dunod-Gauthier-Villars}, address = {Paris}, volume = {9}, number = {R2}, year = {1975}, mrnumber = {388860}, language = {en}, url = {http://archive.numdam.org/item/ITA_1975__9_2_13_0/} }