1. Acuña M. H. Neubauer F. M. & Ness N. F. (1981). Standing Alfven wave
2. current system at Io - Voyager 1 observations. Journal of Geophysical Research
3. 86(A10) 8513-8521. http://doi.org/10.1029/JA086iA10p08513
4. Alfven wave propagation in the Io plasma torus;Bagenal F.;Journal,1983
5. of Geophysical Research 88(A4) 3013-3025. https://doi.org/10.1029/JA088i