A Clifford algebra gauge invariant Lagrangian for gravity. Part 2 :   compatibility with General Relativity tests
  Gauge fields associated to the Dirac matrix algebra used with the standard quadratic gauge field Lagrangian lead to an extended gravitational Lagrangian which includes the Einstein-Hilbert one, plus quadratic, cosmological constant and torsion terms. This note looks at three cases : the static central symmetric field, the isotropic expanding universe, and the asymptotic field of a rotating body, and show that, in weak gravitational fields, there is no contradiction with General Relativity results. 
Jean Pierre Pansart (IRFU)
gr-qc