Fixation of advantageous mutations in an off-equilibrium population O. F.F. Raposo, A. W.S. de Almeida, A. J.F. Souza and P. R.A. Campos Eur. Phys. J. B, 50 4 (2006) 653-657 Published online: 17 May 2006 DOI: 10.1140/epjb/e2006-00176-y