@misc{indiciaebdaf246a4800,
  title = {The Mars direct plan.},
  author = {R Zubrin},
  year = {2000},
  doi = {10.1038/scientificamerican0300-52},
  url = {https://pubmed.ncbi.nlm.nih.gov/10736835/},
  note = {Source identifier: 10736835}
}