1. Aebi, H. 1974. Catalases. In Weinheim, B.H.V. (ed) Methods of Enzymatic Analysis: 685–690 Verlag Chemic.
2. Agrawal, M., Nandi, P.K. & Rao, D.N. 1983. Ozone and sulphur dioxide effects on Panicum miliaceum plant. Bulletin Torry Botanical Club
110: 435–441.
3. Arnon, D.I. 1951. Extracellular photosynthetic reactions. Nature
167: 1008–1010.
4. Bell, J.N.B., Rutler, A.J. & Relton, J. 1979. Studies on the effects of low levels of sulphur dioxide on growth of Lolium perenne L. New Phytologist
83: 627–643.
5. Hongfa, C., Shu, J., Shen, Y., Gao, Y., Gao, J. & Zhang, L. 2000. Effects of sulfur dioxide and acid deposition on Chinese crops. In Agrawal, S.B. & Agrawal, M. (eds) Environmental Pollution & Crop Responses: 295–305. Lewis Publishers, Boca Raton.