Scanning tunneling microscopy observation of tightly wound, single-wall coiled carbon nanotubesL. P. Biró, S. D. Lazarescu, P. A. Thiry, A. Fonseca, J. B. Nagy, A. A. Lucas and Ph. LambinEurophys. Lett., 50 4 (2000) 494-500DOI: https://doi.org/10.1209/epl/i2000-00296-0