TY  - RPRT
TI  - Chaotic dynamics in classical s-wave helium.
AU  - Z Q Bai
AU  - Y Gu
PY  - 1999
DO  - 10.1103/physreve.60.3866
UR  - https://pubmed.ncbi.nlm.nih.gov/11970221/
ID  - 11970221
ER  -