CBR Anisotropy in an Open Inflation, CDM Cosmogony
  We compute the cosmic background radiation anisotropy, produced by energy-density fluctuations generated during an early epoch of inflation, in an open cosmological model based on the cold dark matter scenario. At $\Omega_0 \sim$ 0.3 -- 0.4, the COBE normalized open model appears to be consistent with most observations. 
Marc Kamionkowski, Bharat Ratra, David N. Spergel, and Naoshi Sugiyama