Interfacing Friedman and string cosmologies
  Compactification and symmetry breaking events in theories of heterotic superstrings implicitly indicate five inflation events. Scales of 10^{9} ly and larger are modeled in terms of these events. The proposed model accounts qualitatively for recent observations (of galactic clusters that lie on "thin,.. semi-spherical shells") and motivates a calculation that accounts (approximately) for the observed number of galaxies. 
J. Towe