@misc{indiciae7bd6fac88f7a,
  title = {Bacterial bedfellows: a microscopic menage a trois may be responsible for a major step in evolution},
  author = {Sagan, D. and Margulis, L.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/20040089095},
  note = {Source identifier: 20040089095}
}