@article {10550,
	title = {Scanning tunneling microscopy study of polymerized carbon nanobells: Electronic effect and evidence of nitrogen incorporation},
	journal = {Physical Review B - Condensed Matter and Materials Physics},
	year = {2002},
	pages = {854231-854235},
	author = {Hai-Lin Sun and Jin-Feng Jia and Dingyong Zhong and Quan-Tong Shen and Mu Sun and Qi-Kun Xue and E.G. Wang}
}
