1. Allamandola, L. J., Sandford, S. A. and Valero, G. J. (1988), Icarus, 76, 225-252.
2. Photochemical reactions of water and carbon monoxide in Earth's primitive atmosphere
3. Benton, E. V., Frank, A. L., Benton, E. R., Csige, I., Parnell, T. A. and Watts, J. W. Jr. (1991), NASA- Langley Research Center report, NASA CP 3134 (Part 1), 325-337.
4. Briggs, R., Ertem, G., Ferris, J. P., Greenberg, J. M., McCain, P. J., Mendoza-Gomez, C. X., and Schutte, W. (1992), Origins Life Evol. Biosphere, 22, 287-307.
5. Fogleman, G., Huntigton, J. L., Schwartz, D. E. and Fonda, M. L. (1989), Gas-Grain Simulation Facility: Fundamental tudies of Particle Formation and Interactions. Vol. 1, Chapter 1, NASA CP 10026.