Secondary electron emission from highly charged carbon grains M. Beránek, I. Richterová, Z. Němeček, J. Pavlu and J. Šafránková Eur. Phys. J. D, 54 2 (2009) 299-304 Published online: 05 December 2008 DOI: 10.1140/epjd/e2008-00236-6