@inproceedings{Campbell21a,
  author    = {Graham Campbell},
  editor    = {Patrick Bahr},
  title     = {Parallel Hyperedge Replacement String Languages},
  booktitle = {Proc.\ 11th International Workshop on Computing with Terms and Graphs ({TERMGRAPH} 2020)},
  publisher = {Open Publishing Association},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {334},
  pages     = {46--61},
  year      = {2021},
  doi       = {10.4204/EPTCS.334.4}
}