@misc{indiciae17ede42b52f6,
  title = {Evolving combinatorial problem instances that are difficult to solve.},
  author = {Jano I van Hemert},
  year = {2006},
  doi = {10.1162/evco.2006.14.4.433},
  url = {https://pubmed.ncbi.nlm.nih.gov/17109606/},
  note = {Source identifier: 17109606}
}