TY  - RPRT
TI  - Multipolar contributions to optical second-harmonic generation in isotropic fluids.
AU  - XD Zhu
AU  - YR Shen
PY  - 1990
DO  - 10.1103/physreva.41.4549
UR  - https://pubmed.ncbi.nlm.nih.gov/9903663/
ID  - 9903663
ER  -