@misc{indiciae78bbd4af76ca,
  title = {Physical sciences: sunspots and planetary orbits.},
  author = {R A Bureau and L B Craine},
  year = {1970},
  doi = {10.1038/228984a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/16059025/},
  note = {Source identifier: 16059025}
}