[8] Hutchinson I H. Principles of Plasma Diagnostics. UK: Cambridge University Press, 2002.
[9] Griem H R. Plasma Spectroscopy. New York: McGraw-Hill Book Company, 1964.
[14] Mu Y L, Yuan P, Wang X J, et al. Journal of Atmospheric and Solar-Terrestrial Physics, 2016, 145: 98.
[15] Dong C X, Yuan P, Cen J Y, et al. Atmospheric Research, 2016, (178-179): 1.