@misc{indiciae6cc0d603e9f8,
  title = {Grand unification with three generations in free fermionic string models.},
  author = {D Finnell},
  year = {1996},
  doi = {10.1103/physrevd.53.5781},
  url = {https://pubmed.ncbi.nlm.nih.gov/10019865/},
  note = {Source identifier: 10019865}
}