Gauge theory of gravity: Electrically charged solutions within the   metric--affine framework
  We find a class of electrically charged exact solutions for a toy model of metric-affine gravity. Their metric is of the Pleba\'nski-Demia\'nski type and their nonmetricity and torsion are represented by a triplet of covectors with dilation, shear, and spin charges. 
Friedrich W. Hehl (Cologne) and Jos\'e Socorro (Cologne and Le\'on)