TY  - RPRT
TI  - Experimental constraints on a stringy SU(5) x U(1) model.
AU  - JL Lopez
AU  - DV Nanopoulos
AU  - A Zichichi
PY  - 1996
DO  - 10.1103/physrevd.53.5253
UR  - https://pubmed.ncbi.nlm.nih.gov/10020521/
ID  - 10020521
ER  -