1. Revilla E, Llobell A & Paneque A, J Plant Physiol, 118 (1986) 165.
2. Siva Raju K, Sharma ND & Lodha ML, J Plant giochem Biotech, 5 (1996) 13.
3. Tledje JM, Sorensen J & Change L, In Environmental microbiology of anaerobes (AJB Zehnder, Editor) Wiley, New York (1988) p 179.
4. Rice CW & Tledje JM, Soil Biol Biochem, 21 (1989) 597.
5. Ullrich WR, Encyclopedia of Plant Physiol, Vol. 6 (A Lauchii, RL Bieleski, Editors) Springer, Berlin Heidelberg New York (1983) pp 276–298.