1. Brown, G. W., Carr, T. D., and Block, W. F.: 1968, Astrophys. Letters 1, 89.
2. Carr, T. D., Desch, M. D., and Alexander, J. K.: 1983, in A. J. Dessler (ed.), Physics of the Jovian Magnetosphere, Cambridge University Press.
3. Cole, T. W.: 1968, Optics Technol. 1, 31.
4. Cole, T. W.: 1973, Proc. IEEE 61, 1321.
5. Cole, T. W. and Ables, J. G.: 1974, Astron. Astrophys. 34, 149.