@Inproceedings{EPTCS151.6, author = {Barash, Mikhail and Okhotin, Alexander}, year = {2014}, title = {Grammars with two-sided contexts}, editor = {\'Esik, Zolt\'an and F\"ul\"op, Zolt\'an}, booktitle = {{\rm Proceedings 14th International Conference on} Automata and Formal Languages, {\rm Szeged, Hungary, May 27-29, 2014}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {151}, publisher = {Open Publishing Association}, pages = {94-108}, doi = {10.4204/EPTCS.151.6}, }