[1] Dyer R, Naples A, Kaemming T, et al. 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012. 121.
[2] Welsh D J, King P, Schauer F, et al. 52nd Aerospace Sciences Meeting, 2014. 1316.
[5] Claflin S. U. S. Patent, 9046058, 2015.
[6] Tsolas N, Togai K, Yetter R A. 53rd AIAA Aerospace Sciences Meeting, 2015. 0159.
[9] Golubovskii Y B, Maiorov V A, Li P, et al. Journal of Physics D: Applied Physics, 2006, 39(8): 1574.
[10] Shao T, Zhang C, Yu Y, et al. Vacuum, 2012, 86(7): 876.
[13] Joshi N K, Sahasrabudhe S N, Sreekumar K P, et al. The European Physical Journal D-Atomic, Molecular, Optical and Plasma Physics, 2003, 26(2): 215.
[14] Griem H R. Physical Review, 1962, 128(2): 515.