@misc{indiciaea38a7a5b2b71,
  title = {The unbreakable stone?},
  author = {J Plawner and B V Surya and M Rothberg},
  year = {1987},
  doi = {10.1016/0090-4295(87)90507-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/3564214/},
  note = {Source identifier: 3564214}
}