Tip-induced distortions in STM imaging of carbon nanotubes H. Hövel, M. De Menech, M. Bödecker, C. Rettig, U. Saalmann and M. E. Garcia Eur. Phys. J. D, 45 3 (2007) 459-463 Published online: 29 June 2007 DOI: 10.1140/epjd/e2007-00226-2