@misc{indiciaef7ecbbc735c8,
  title = {Number of generations in free fermionic string models.},
  author = {I Giannakis and DV Nanopoulos and K Yuan},
  year = {1995},
  doi = {10.1103/physrevd.52.1026},
  url = {https://pubmed.ncbi.nlm.nih.gov/10019319/},
  note = {Source identifier: 10019319}
}