@misc{indiciae939febbe66ce,
  title = {The magic ball induction.},
  author = {R F Spencer},
  year = {1994},
  doi = {10.1213/00000539-199408000-00047},
  url = {https://pubmed.ncbi.nlm.nih.gov/7639394/},
  note = {Source identifier: 7639394}
}