@inbook{inbook556c44fb,
title   = {Matter density fluctuations in the running 'lâmbda'CDM and 'lâmbda'XCDM models},
author = {Grande, J and Opher, Reuven and Pelison, A and Solá, J},
year = {2009},
publisher = {European Astronomical Society},
journal   = {Dark energy and dark matter: observations, experiments and theories}
}