Criteria to disprove context freeness of collage languages

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},
}