The dressed states of an electron in a one-dimensional two δ-functions potential C. Chirilã, M. Boca, V. Dinu and V. Florescu Eur. Phys. J. D, 27 1 (2003) 15-22 Published online: 29 July 2003 DOI: 10.1140/epjd/e2003-00230-6