@article{ITA_1982__16_3_191_0, author = {Ross, Rockford and Winklmann, Karl}, title = {Repetitive strings are not context-free}, journal = {RAIRO. Informatique th\'eorique}, pages = {191--199}, publisher = {EDP-Sciences}, volume = {16}, number = {3}, year = {1982}, zbl = {0489.68071}, mrnumber = {686912}, language = {en}, url = {http://archive.numdam.org/item/ITA_1982__16_3_191_0/} }