Hartree-Fock approximation of bipolaron state in quantum dots and wires R. T. Senger, B. Kozal, A. Chatterjee and A. Erçelebi Eur. Phys. J. B, 78 4 (2010) 525-529 Published online: 10 December 2010 DOI: 10.1140/epjb/e2010-10517-x