@misc{indiciae94de9977c7bd,
  title = {Spatial codes and the hardness of string folding problems.},
  author = {A Nayak and A Sinclair and U Zwick},
  year = {1999},
  doi = {10.1089/cmb.1999.6.13},
  url = {https://pubmed.ncbi.nlm.nih.gov/10223662/},
  note = {Source identifier: 10223662}
}