Dynamical exchange effects in the dielectric function of the two-dimensional electron gas K. J. Hameeuw, F. Brosens and J. T. Devreese Eur. Phys. J. B, 35 1 (2003) 93-101 Published online: 22 September 2003 DOI: 10.1140/epjb/e2003-00259-3