@misc{indiciae074e6204d79b,
  title = {Self-dual N=8 supergravity as closed N=2(4) strings.},
  author = {W Siegel},
  year = {1993},
  doi = {10.1103/physrevd.47.2504},
  url = {https://pubmed.ncbi.nlm.nih.gov/10015844/},
  note = {Source identifier: 10015844}
}