TY  - RPRT
TI  - Mass renormalization by instantons and the strong CP problem.
AU  - K Choi
AU  - CW Kim
AU  - WK Sze
PY  - 1988
DO  - 10.1103/physrevlett.61.794
UR  - https://pubmed.ncbi.nlm.nih.gov/10039432/
ID  - 10039432
ER  -