TY  - RPRT
TI  - Conserved quantities at spatial and null infinity: The Penrose potential.
AU  - JN Goldberg
PY  - 1990
DO  - 10.1103/physrevd.41.410
UR  - https://pubmed.ncbi.nlm.nih.gov/10012346/
ID  - 10012346
ER  -