@misc{indiciaed1fb0bda2ffb,
  title = {Two-vierbein formalism for string-inspired axionic gravity.},
  author = {W Siegel},
  year = {1993},
  doi = {10.1103/physrevd.47.5453},
  url = {https://pubmed.ncbi.nlm.nih.gov/10015570/},
  note = {Source identifier: 10015570}
}