Erratum to: Dielectric function of graphene based quantum dot under the uniaxial stressA. Phirouznia, N. Akbari, S. Lotfi and K. Jamshidi-GhalehEur. Phys. J. B, 85 9 (2012) 309DOI: https://doi.org/10.1140/epjb/e2012-30724-7