@misc{indiciaeb66eac17665e,
  title = {Testing the rigidity assumption: a reply to Ullman.},
  author = {M L Braunstein and G J Andersen},
  year = {1986},
  doi = {10.1068/p150641},
  url = {https://pubmed.ncbi.nlm.nih.gov/3588224/},
  note = {Source identifier: 3588224}
}