Carbon nanotube bundles and thin layers probed by micro-Raman spectroscopy L. Sangaletti, S. Pagliara, F. Parmigiani, P. Galinetto, R. Larciprete, S. Lizzit and A. Goldoni Eur. Phys. J. B, 31 2 (2003) 203-208 Published online: 04 February 2003 DOI: 10.1140/epjb/e2003-00024-8