TY  - RPRT
TI  - Solution to the strong CP problem without an axion.
AU  - KS Babu
AU  - RN Mohapatra
PY  - 1990
DO  - 10.1103/physrevd.41.1286
UR  - https://pubmed.ncbi.nlm.nih.gov/10012465/
ID  - 10012465
ER  -