A. Ayenehband, , , Gh. Noormohammadi, , , A. Modhej, , , A. Naderi, , and Y. Emam, . "Effect of Different Nitrogen Levels on Grain Yield, Grain Protein Content and Agronomic Nitrogen Use Efficiency in Wheat Genotypes under Optimum and Post-anthesis Heat Stress Conditions", Seed and Plant Production Journal, 25, 4, 2010, 353-371. doi: 10.22092/sppj.2017.110383