1. Gautier, D. and Owen, T. C. (1989) The composition of the outer planet atmospheres, in S.K. Atreya, J.B. Pollack and M.S. Matthews (eds.),Origin and Evolution of Planetary and Satellite Atmospheres, University of Arizona Press, Tucson, pp. 487?512.
2. Marten, A., Gautier, D., Owen, T., Sanders, D.B., Matthews, H.E., Atreya, S.K., Tilanus, R.P.J. and Deane, J.R. (1993) First observations of CO and HCN on Neptune and Uranus at millimeter wavelengths and their implications for atmospheric chemistry,Astrophys. J. 406, 285?297.
3. Rosenqvist, J., Lellouch, E., Romani, P.N., Paubert, G. and Encrenaz, T. (1992) Millimeter-wave observations of Saturn, Uranus, and Neptune: CO and HCN on Neptune,Astrophys. J. 392, L99-L102.
4. Atreya, S.K., Owen, T.C., Gautier, D. and Marten, A. (1992) HCN and CO on Neptune: An intrinsic origin,Bull. Am. Astron. Soc. 24, 972, and Paper presented at the Division of Planetary Sciences Meeting, AAS, Munich, Germany, October, 1992.
5. Gautier, D., Conrath, B.J., Owen, T., De Pater, I and Atreya, S.K. (1994) The Troposphere of Neptune, D. Cruikshank (ed.),Neptune, University of Arizona Press, Tucson, in press.