A. P. Regmi, J. K. Ladha, P. Singh, A. L. Kundu, S. Das, H. P. Aggarwal, A. L. Bhandari, S. K. Gami, H. Pathak, E. M. Bhattarai, R. Sakal, R. K. Gupta, C. R. Yadav, P. R. Hobbs, N. Ram, Padre At, Kundu Al, Singh Yadvinder, Gupta Rk, Hobbs Pr, Yadav Rl, Aggarwal Hp, Singh Bijay, Yadav Cr, Bhandari Al, Regmi Ap, Ladha Jk, Gami Sk, R. Amin, Bhattarai Em, A. T. Padre, R. L. Yadav, D. Dawe, Y. Singh,
How extensive are yield declines in long-term rice-wheat experiments in Asia? Field Crops Res ,(2003)