1. Ackerson, R. C., Havelka, U. D., and Boyle, M. G. (1984). C02 enrichment effects on soybean physiology. II. Effects of stage specific S02 exposure. Crop Science 24: 1150–1154.
2. Acock, B., and Allen, L. H. J. (1985). Crop responses to elevated carbon dioxide concentrations. In: B. R. Strain and J. D. Cure (Eds.), Direct effects of increasing carbon dioxide on vegetation (pp. 53–98). Washington, DC: U.S. Department of Energy.
3. Allen, L. H., Jr. (1990). Plant responses to rising carbon dioxide and potential interactions with air pollutants. Journal of Environmental Quality 19: 15–34.
4. Amthor, J. S. (1991). Respiration in a future, higher-C02 world. Plant, Cell and Environment, 14: 13–20.
5. Amthor, J. S., Koch, G. W., and Bloom, A. J. (1992). C02 inhibits respiration in leaves of Rumex crispusi L. Plant Physiology 71: 574–581.