TY  - RPRT
TI  - Photon-photon resonances in quantum electrodynamics.
AU  - JW Darewych
AU  - M Horbatsch
AU  - R Koniuk
PY  - 1992
DO  - 10.1103/physrevd.45.675
UR  - https://pubmed.ncbi.nlm.nih.gov/10014420/
ID  - 10014420
ER  -