TY  - RPRT
TI  - Hadronic matrix elements and the pi +- pi 0 mass difference.
AU  - WA Bardeen
AU  - J Bijnens
AU  - J Gérard
PY  - 1989
DO  - 10.1103/physrevlett.62.1343
UR  - https://pubmed.ncbi.nlm.nih.gov/10039649/
ID  - 10039649
ER  -