Holographic Dark Energy with Time Varying n^2 Parameter in Non-Flat   Universe
  We consider a holographic dark energy model, with a varying parameter, n, which evolves slowly with time. We obtain the differential equation describing evolution of the dark energy density parameter, $\Omega_d$, for the flat and non-flat FRW universes. The equation of state parameter in this generalized version of holographic dark energy depends on n. 
Bushra Majeed, Mubasher Jamil and Azad A. Siddiqui
gr-qc