@inproceedings{Campbell20d, author = {Graham Campbell}, editor = {Patrick Bahr}, title = {Parallel Hyperedge Replacement String Languages}, booktitle = {Pre-Proc.\ 11th International Workshop on Computing with Terms and Graphs ({TERMGRAPH} 2020)}, year = {2020}, url = {https://cdn.gjcampbell.co.uk/2020/PHRS-Languages-Preproc.pdf}, }