1. A. Jablonski, F. Salvat, and C. J. Powell, NIST Electron Elastic Scattering Cross Section Database, Version 3.2, Standard Reference Data Program Database No. 64. http://www.nist.gov/srd/nist64.cfm
2. F. Ybero and S. Tougaard, Phys. Rev. B 71, 045414 (2005)
3. C. Biswas, A. K. Shukla, S. Banik, V. K. Ahire, and S. R. Barman, Phys. Rev. B 67, 165416 (2003).
4. V. P. Afanas’ev and A. V. Lubenchenko, Surf. Invest. 13, 1087 (1998).
5. V. P. Afanas’ev, A. V. Lubenchenko, and M. K. Gubkin, Europhys. J. B 37, 117 (2004).