$\Lambda$-Inflation and CMBR Anisotropy
  We argue that a $\Lambda$-inflation model can ensure large relative contribution of cosmic gravity waves into the $\Delta T/T$ at COBE scale preserving at the same time a near scale-invariant spectrum of cosmological density perturbations favored by observational data ($n_S\simeq 1$). High efficiency of these models to meet observational tests is discussed. 
Vladimir N. Lukash (Astro Space Center of P.N.Lebedev Physical   Institute)