@misc{indiciaedd01c4276278,
  title = {Composite, large spirochetes from microbial mats: spirochete structure review.},
  author = {L Margulis and J B Ashen and M Solé and R Guerrero},
  year = {1993},
  doi = {10.1073/pnas.90.15.6966},
  url = {https://pubmed.ncbi.nlm.nih.gov/8346204/},
  note = {Source identifier: 8346204}
}