Krimigis, S. M., Armstrong, T. P., Axford, W. I., Bostrom, C. O., Gloeckler, G., Keath, E. P., Lanzerotti, L. J., Carbary, J. F., Hamilton, D. C., & Roelof, E. C. (1981). Low-energy charged particles in Saturn's magnetosphere: Results form Voyager 1. Science, 212, 225-231.