@techreport{Campbell-Romo-Plump20d,
  author      = {Graham Campbell and Jack Rom{\"o} and Detlef Plump},
  title       = {The Improved {GP\,2} Compiler},
  institution = {Department of Computer Science, University of York, {UK}},
  year        = {2020},
  url         = {https://cdn.gjcampbell.co.uk/2020/Improved-GP2-Compiler.pdf},
}