1. Lunine, J., Atreya, S. K. & Pollack, J. B. in Origin and Evolution of Atmospheres (eds Atreya, S. K., Pollack, J. B. & Matthews, M. S.) (University of Arizona Press, Tucson) (in the press).
2. Pollack, J. B. & Bodenheimer, P. in Origin and Evolution of Atmospheres (eds Atreya, S. K., Pollack, J. B. & Matthews, M. S.) (University of Arizona Press, Tucson) (in the press).
3. Prinn, R. G. & Fegley, B. Astrophys. J. 249, 308–317 (1981).
4. Atreya, S. K., Donahue, T. M. & Kuhn, W. R. Science, Wash. 201, 611–613 (1978).
5. Chameides, W. L. Nature 277, 123–125 (1979).