@article{article51b98d6c,
title   = {Conceptual problem for noncommutative inflation and the new approach for nonrelativistic inflationary equation of state},
author = {Machado, U. D and Opher, Reuven},
year = {2013},
doi = {10.1103/PhysRevD.87.123517},
journal   = {Physical Review D}
}