@misc{indiciae8b2acd385533,
  title = {Space time singularities in string theory and string propagation through gravitational shock waves.},
  author = {de Vega HJ and N Sánchez},
  year = {1990},
  doi = {10.1103/physrevlett.65.1517},
  url = {https://pubmed.ncbi.nlm.nih.gov/10042286/},
  note = {Source identifier: 10042286}
}