Energy levels and multipole transition properties of C4+ ion in Debye plasmas L.Y. Xie, J.G. Wang, R.K. Janev, Y.Z. Qu and C.Z. Dong Eur. Phys. J. D, 66 5 (2012) 125 Published online: 17 May 2012 DOI: 10.1140/epjd/e2012-20594-6