@misc{indiciaebb7d7a1b1087,
  title = {Simple discrete symmetries in phenomenologically viable E6 superstring models.},
  author = {M Drees and X Tata},
  year = {1987},
  doi = {10.1103/physrevlett.59.528},
  url = {https://pubmed.ncbi.nlm.nih.gov/10035797/},
  note = {Source identifier: 10035797}
}