TY  - RPRT
TI  - Number of generations in free fermionic string models.
AU  - I Giannakis
AU  - DV Nanopoulos
AU  - K Yuan
PY  - 1995
DO  - 10.1103/physrevd.52.1026
UR  - https://pubmed.ncbi.nlm.nih.gov/10019319/
ID  - 10019319
ER  -