@misc{indiciaecfb0ea42b392,
  title = {Spacetime singularities in string theory.},
  author = {GT Horowitz and AR Steif},
  year = {1990},
  doi = {10.1103/physrevlett.64.260},
  url = {https://pubmed.ncbi.nlm.nih.gov/10041934/},
  note = {Source identifier: 10041934}
}