@article {1659,
	title = {A first principles study of the optical properties of CxNy single walled nanotubes},
	journal = { Nanotechnology},
	volume = {20},
	year = {2009},
	pages = { 175701},
	author = {D. Jana* and A. Chakraborti and L. C. Chen and C. W. Chen and K. H. Chen}
}
