TY  - RPRT
TI  - First-order symmetric hyperbolic Einstein equations with arbitrary fixed gauge.
AU  - S Frittelli
AU  - OA Reula
PY  - 1996
DO  - 10.1103/physrevlett.76.4667
UR  - https://pubmed.ncbi.nlm.nih.gov/10061351/
ID  - 10061351
ER  -