M. Toussaint, A numeric solution for Einstein's gravitational theory with Proca matter and metric-affine gravity, GEN RELAT G, 32(9), 2000, pp. 1689-1709
A special case of metric-affine gauge theory of gravity (MAG) is equivalent
to general relativity with Proca matter as source. We study in detail a co
rresponding numeric solution of the Reissner-Nordstrom type. It is static,
spherically symmetric, and of electric type. In particular, this solution h
as no horizon, so it has a naked singularity at its origin.