@article{articled3918178,
title   = {Physical approximations for the nonlinear evolution of perturbations in inhomogeneous dark energy scenarios},
author = {Abramo, Luis Raul Weber and Batista, Ronaldo Cardoso and Liberato, L},
year = {2009},
doi = {10.1103/physrevd.79.023516},
journal   = {Physical Review D}
}