@article{SottoKaufmannAtkinsonetal.2021,
  author    = {Fran{\c{c}}oso Dal Piccol Sotto and Paul Kaufmann and Timothy Atkinson and Roman Kalkreuth and M{\´a}rcio Porto Basgalupp},
  title     = {Graph representations in genetic programming},
  journal   = {Genetic Programming and Evolvable Machines},
  volume    = {22},
  number    = {4},
  pages     = {607 -- 636},
  doi       = {10.1007/s10710-021-09413-9},
  year      = {2021},
}