1. Excitation cross-sections by electron impact are provided by the data base AMDIS (National Institute for Fusion Science, Toki)
http://dbshino.nifs.ac.jp/
2. T. Fujimoto: Plasma Spectroscopy (Oxford University Press, Oxford, 2004)
3. M. Goto: J. Quant. Spectrosc. Radiat. Transfer 76, 331 (2003)
4. . G. Csanak, D.C. Cartwright, S.A. Kazantsev, I. Bray: NIFS-PROC-37 (National Institute for Fusion Science, Toki, 1998) p.136, Los Alamos Atomic Physics Codes
http://aphysics2.lanl.gov/tempweb/
5. . I. Bray: (private communications, 2004), CCC Data Base
http://atom.murdoch.edu.au/CCC-WWW/index.html