1. Kropff, M.J., Cassman, K.G., Peng, S., Matthews, R.B. and Setter, T.L. 1994. Quantitative understanding of yield potential. In K.G. Cassman, ed., Breaking the Yield Barrier. International Rice Research Institute, Los Baños., 21-38.
2. Moldenhauer, K.A.K. and Gibbons, J.H. 2003. Rice Morphology and Development. In C.W. Smith and R.H. Dilday eds., Rice: Origin, History, Technology, and Production. John Wiley & Sons, Inc., New Jersey. 103-128.
3. Murata, Y. 1969. Physiological responses to nitrogen in plants. In J.D. Eastin, F.A. Haskins, C.Y. Sullivan, Bavel van C.H.M. and R.C. Dinauer eds. Physiological Aspects of Crop Yield. American Society of Agronomy, Madison. 235-263.