Erratum to: Dielectric function of graphene based quantum dot under the uniaxial stress A. Phirouznia, N. Akbari, S. Lotfi and K. Jamshidi-Ghaleh Eur. Phys. J. B, 85 9 (2012) 309 Published online: 10 September 2012 DOI: 10.1140/epjb/e2012-30724-7