@misc{indiciaee6350ce8eaef,
  title = {A machine for bending perspex.},
  author = {R Ellis and C Kirkwood},
  year = {1966},
  doi = {10.1016/s0140-6736(66)90191-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4159967/},
  note = {Source identifier: 4159967}
}