TY  - RPRT
TI  - Vector-pseudoscalar mass splitting and Upsilon - eta b mass difference.
AU  - X Song
PY  - 1989
DO  - 10.1103/physrevd.40.3655
UR  - https://pubmed.ncbi.nlm.nih.gov/10011744/
ID  - 10011744
ER  -