Are complex systems hard to evolve?

Andy Adamatzky, Larry Bull. Are complex systems hard to evolve?. Complexity, 14(6):15-20, 2009. [doi]

@article{AdamatzkyB09,
  title = {Are complex systems hard to evolve?},
  author = {Andy Adamatzky and Larry Bull},
  year = {2009},
  doi = {10.1002/cplx.20269},
  url = {http://dx.doi.org/10.1002/cplx.20269},
  researchr = {https://researchr.org/publication/AdamatzkyB09},
  cites = {0},
  citedby = {0},
  journal = {Complexity},
  volume = {14},
  number = {6},
  pages = {15-20},
}