@misc{Campbell-Plump20b,
  author = {Graham Campbell},
  title  = {Confluence up to Garbage},
  year   = {2020},
  note   = {To be presented at the 13th International Conference on Graph Transformation ({ICGT} 2020)},
  url    = {https://cdn.gjcampbell.co.uk/2020/Confluence-Garbage-Handouts.pdf},
}