TY  - RPRT
TI  - Topological two-form gravity in four dimensions.
AU  - HY Lee
AU  - A Nakamichi
AU  - T Ueno
PY  - 1993
DO  - 10.1103/physrevd.47.1563
UR  - https://pubmed.ncbi.nlm.nih.gov/10015733/
ID  - 10015733
ER  -