TY  - RPRT
TI  - 2-->n threshold production at the tree level.
AU  - LS Brown
AU  - C Zhai
PY  - 1993
DO  - 10.1103/physrevd.47.5526
UR  - https://pubmed.ncbi.nlm.nih.gov/10015578/
ID  - 10015578
ER  -