1. S. Brezinsek, G. Sergienko, A. Pospieszczyk, et al., Plasma Phys. Controlled Fusion 47, 615 (2001).
2. E. M. Hollmann, S. Brezinsek, N. H. Brooks, et al., Plasma Phys. Controlled Fusion 48, 1165 (2006).
3. A. Pospieszczyk, S. Brezinsek, G. Sergienko, et al., J. Nucl. Mater. 337–339, 500 (2005).
4. A. M. Zimin, V. A. Krupin, V. I. Troinov, and L. A. Klyuchnikov, Yad. Fiz. Inzh. 5, 557 (2014).
5. V. N. Ochkin, Spectroscopy of Low Temperature Plasma (Fizmatlit, Moscow, 2010) [in Russian].