Density preturbations in a finite scale factor singularity universe
  We discuss evolution of density perturbations in cosmological models which admit finite scale factor singularities. After solving the matter perturbations equations we find that there exists a set of the parameters which admit a finite scale factor singularity in future and instantaneously recover matter density evolution history which are indistinguishable from the standard LCDM scenario. 
Adam Balcerzak and Tomasz Denkiewicz
astro-ph.CO gr-qc