TY  - RPRT
TI  - 4-Dimensional Special Orthonormal Frames for Vacuum Gravity
AU  - Estabrook, F. B.
AU  - Robinson, R. S.
AU  - Wahlquist, H. D.
PY  - 1996
UR  - https://ntrs.nasa.gov/citations/20060036779
ID  - 20060036779
ER  -