@misc{indiciae843302dc4f42,
  title = {The asteroid tugboat.},
  author = {Russell L Schweicart and Edward T Lu and Piet Hut and Clark R Chapman},
  year = {2003},
  doi = {10.1038/scientificamerican1103-54},
  url = {https://pubmed.ncbi.nlm.nih.gov/14564813/},
  note = {Source identifier: 14564813}
}