Frank Drewes, Hans-Jörg Kreowski, Denis Lapoire. Criteria to disprove context freeness of collage languages. Theoretical Computer Science, 290(3):1445-1458, 2003.
@article{DrewesKL03, title = {Criteria to disprove context freeness of collage languages}, author = {Frank Drewes and Hans-Jörg Kreowski and Denis Lapoire}, year = {2003}, tags = {context-aware}, researchr = {https://researchr.org/publication/DrewesKL03}, cites = {0}, citedby = {0}, journal = {Theoretical Computer Science}, volume = {290}, number = {3}, pages = {1445-1458}, }