@misc{indiciae1cde28f15310,
  title = {Replication of plasmid supercoiled DNA.},
  author = {D R Helinski and D G Blair and D J Sherratt and M Lovett and Y Kupersztoch and D T Kingsbury},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4607019/},
  note = {Source identifier: 4607019}
}