N. ÓMurchadha

Existence, uniqueness and other properties of the BCT (minimal strain lapse and shift) gauge

C. Gundlach, D. Garfinkle, J. Isenberg, 2000, gr-qc/0003113.

The Poincaré group as the symmetry group of canonical general relativity

R. Beig, N. ÓMurchadha, 1987 .

Positivity of energy and stationary solutions in general relativity

N. ÓMurchadha, 1977 .