@misc{indiciae6c8bb4f10cfd,
  title = {Enumeration of structure-sensitive graphical subsets: Calculations.},
  author = {R E Marrifield and H E Simmons},
  year = {1981},
  doi = {10.1073/pnas.78.3.1329},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592991/},
  note = {Source identifier: 16592991}
}