TY  - RPRT
TI  - Exact sum rules with approximate ground states
AU  - Johnson, Calvin W.
AU  - Luu, Ken Anh
AU  - Lu, Yi
PY  - 2020
DO  - 10.1088/1361-6471/abacda
UR  - https://www.osti.gov/biblio/1783187
ID  - 1783187
ER  -