Resonant tunneling through a two-level dot and double quantum dots T. Pohjola, J. König, M. M. Salomaa, J. Schmid, H. Schoeller and Gerd Schön Europhys. Lett., 40 2 (1997) 189-194 Published online: 01 September 2002 DOI: 10.1209/epl/i1997-00444-0