p-brane dynamics in (N+1)-dimensional FRW universes: a unified framework
  We develop a velocity-dependent one-scale model describing p-brane dynamics in flat homogeneous and isotropic backgrounds in a unified framework. We find the corresponding scaling laws in frictionless and friction dominated regimes considering both expanding and collapsing phases. 
L. Sousa, P.P. Avelino
hep-th astro-ph.CO gr-qc hep-ph