@article {10534,
	title = {Vacuum gap dependence of field electron emission properties of large area multi-walled carbon nanotube films},
	journal = {Journal of Physics D: Applied Physics},
	year = {2001},
	pages = {1597-1601},
	doi = {10.1088/0022-3727/34/11/307},
	author = {N.S. Xu and Y. Chen and S.Z. Deng and J. Chen and X.C. Ma and E.G. Wang}
}
