1. Effect of sowing date on emergence, tillering and grain yield of different wheat varieties under Bahawalpur conditions;Akhtar;Pak. J. Agric. Sci.,2012
2. Solar and terrestrial radiation;Angstrom;Quart. J. Roy. Meteor. Soc.,1924
3. Estimation of instant solar radiation by using of instant temperature;Bajpai;Acta Monta. Slovaca,2009
4. Flood and drought of the yangtze river basin;Changjiang Water Resource Commission (CWRC),2001
5. Analysis of 40 years of solar radiation data from China, 1961–2000;Che;Geophys. Res. Lett.,2005