1. Alexeff, I., Jones, W.D., Lonngren, K.: Phys. Rev. Lett. 21, 8768 (1968)
2. Alinejad, H., Shahmansory, M.: Phys. Plasmas 19, 083705 (2012)
3. Chandrasekhar, S.S.: Mon. Not. R. Astron. Soc. 113, 667 (1953)
4. El-Awady, E.I., Moslem, W.M.: Phys. Plasmas 18, 082306 (2011)
5. El-Taibany, W.F., Mushatq, A., Mosloem, W.M., Wadati: Phys. Plasmas 1(7), 034501 (2010)