@techreport{Campbell-Courtehoute-Plump19a,
  author      = {Graham Campbell and Brian Courtehoute and Detlef Plump},
  title       = {Linear-Time Graph Algorithms in {GP\,2}},
  type        = {Submitted for publication},
  institution = {Department of Computer Science, University of York, {UK}},
  year        = {2019},
  url         = {https://cdn.gjcampbell.co.uk/2019/Linear-Time-GP2-Preprint.pdf},
}