Electron transport and tunnelling spectroscopy in alkali doped metal phthalocyanines M.F. Craciun, S. Rogge, M.J.L. den Boer, T.M. Klapwijk and A.F. Morpurgo J. Phys. IV France, 114 (2004) 607-610 DOI: 10.1051/jp4:2004114144