TY  - RPRT
TI  - Simple discrete symmetries in phenomenologically viable E6 superstring models.
AU  - M Drees
AU  - X Tata
PY  - 1987
DO  - 10.1103/physrevlett.59.528
UR  - https://pubmed.ncbi.nlm.nih.gov/10035797/
ID  - 10035797
ER  -