@misc{indiciae21a18888038b,
  title = {Simplifying intersections of surfaces.},
  author = {H C Griffith and O G Harrold},
  year = {1970},
  doi = {10.1073/pnas.65.4.837},
  url = {https://pubmed.ncbi.nlm.nih.gov/16591827/},
  note = {Source identifier: 16591827}
}