@misc{indiciae400c0a3a1de9,
  title = {Circular superhelical DNA.},
  author = {J A Subirana and L C Puigjaner},
  year = {1977},
  doi = {10.1038/267727a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/876396/},
  note = {Source identifier: 876396}
}