Effects of spatial dispersion on the Casimir force between graphene sheets D. Drosdoff, A.D. Phan, L.M. Woods, I.V. Bondarev and J.F. Dobson Eur. Phys. J. B, 85 11 (2012) 365 Published online: 05 November 2012 DOI: 10.1140/epjb/e2012-30741-6