- Arnon, D.I. (1949). Am. J. Pl. Physiol. 24:1-15.
- Barrs, H.D. and Wealther, P.E. (1962). Aust. J. Biol. Sci. 15:413-428.
- Bell, et al. (1971). Plant Physiol. 48:413-415.
- Boyer, J. S. (1976). Water Deficits and Plant Growth. Vol. 4, (Kozolowski, T.T.) Academic Press New York., pp 153-190.
- Bray, E.A. (1993). Plant Physiol. 103:1035-1040.
- Chandra Chandrasekar, V. et al. (2000). J. Agron. Crop. Sci., 185:219-227.
- Deltour, R. and Jacqmard, A. (1974). Zea mays L. Ann. Bot. 38:524-534.
- Good, A.G. and Zaplachinski, S.T. (1994). Physiol. Plant. 90:9-14.
- Kleeper, L. et al. (1971). Pl. Physiol. 48:580-590.
- Kushwaha, B.L. (1994). Indian J. Agron. 39(1):34-37.
- Munjal et al. (1998). J. Plant Physiol. 152:77-79.
- Poonam Sharma et al., (2003). Indian J. Plant Physiol. 12 8 (1).
- Rana, N.S., et al. (1998). Indian J. Agron. 43(1):114-117.
- Reddy, P.S., et al. (1990). Indian J. Exp. Biol. 28:273-276.
- Saxena, H.K. and Shrivastava, R.D.L. (1947-2001), Farm Sci. J.P. 79.
- Sprent, J.I. (1981). Physiology and Biochemistry of Drought Resistance in Plants. Academic Press, Sydney,pp 131-144.