@article{article1b954df5,
title   = {Shear and rotation in Chaplygin cosmology},
author = {Del Popolo, A and Pace, F and Maydanyuk, S. P and Lima, José Ademir Sales de and Jesus, J. F},
year = {2013},
doi = {10.1103/physrevd.87.043527},
journal   = {Physical Review D}
}