@misc{indiciae6baf0b265246,
  title = {Weaving a classical metric with quantum threads.},
  author = {A Ashtekar and C Rovelli and L Smolin},
  year = {1992},
  doi = {10.1103/physrevlett.69.237},
  url = {https://pubmed.ncbi.nlm.nih.gov/10046622/},
  note = {Source identifier: 10046622}
}