1. M.F. Islam, D.E. Milkie, C.L. Kane, A.G. Yodh and J.M. Kikkawa, "Direct measurement of the polarized absorption cross section of single-wall carbon nanotubes", Phys. Rev. Lett., Vol. 93, p. 037404, 2004.

2. A. Ruini, M.J. Caldas, G. Bussi and E. Molinari, "Solid state effects on exciton states and optical properties of PPV", Phys. Rev. Lett., Vol. 88, p. 206403, 2002.

3. F. L onard and J. Tersoff, "Dielectric response of semiconducting carbon nanotubes", Appl. Phys. Lett., Vol. 81, p. 4835, 2002.

4. C.D. Spataru, S. Ismail-Beigi, L.X. Benedict and S.G. Louie, "Excitonic effects and optical spectra of single-walled carbon nanotubes", Phys. Rev. Lett., Vol. 92, p. 077402, 2004.

5. E. Chang, G. Bussi, A. Ruini and E. Molinari, "Excitons in carbon nanotubes: an ab initio symmetry-based approach", Phys. Rev. Lett., Vol. 92, p. 196401, 2004.

6. C.D. Spataru, S. Ismail-Beigi, L.X. Benedict and S.G. Louie, "Excitonic effects and optical spectra of single-walled carbon nanotubes", AIP Conf. Proc., Vol. 772, p. 1061, 2005.

7. H. Zhao and S. Mazumdar, "Electron-electron interaction effects on the optical excitations of semiconducting single-walled carbon nanotubes", Phys. Rev. Lett., Vol. 93, p. 157402, 2004.

8. V. Perebeinos, J. Tersoff and Ph. Avouris, "Scaling of excitons in carbon nanotubes", Phys. Rev. Lett., Vol. 92, p. 257402, 2004.

9. S.M. Bachilo, M.S. Strano, C. Kittrell, R.H. Hauge, R.E. Smaley and R.B. Weisman, "Structure-assigned optical spectra of single-walled carbon nanotubes", Science,