Singh, R.P., A.L. Rao and C. Sen, 2007. Characterization of efficient Azospirillum isolates from rice fields of Uttar Pradesh. J. Ecofreindly Agric., 2: 116-119.
Sen, C. and B. Toms, 2007. Character association and component analysis in wheat (Triticum aestivum L.). Crop Res., 34: 166-170.