1. Adam, H., Ageeb, O., Saunders, D., Hettel, G. 1994. Temperature analysis and wheat yields in the Gezira scheme. Wheat in heat-stressed environments: irrigated, dry area and rice-wheat farming systems. In: Saunders, D.A. (Ed.), Proceedings of the International Conferences, held at Wad Medani, Sudan, 1–4 Feb, 1993 and Dinajpur, Bangladesh, 13–15 February, 1993, pp: 143–145.
2. A structured methodology for developing production systems;Agarwal;Decis. Support Syst.,1992
3. The best planting dates for vegetable crops in Saudi Arabia: evaluation of compatibility between the dates planned based on heat units and dates suggested from the regional offices of the ministry of agriculture and water;Alsadon;J. King Saudi. Univ.,2002
4. Determining the best planting dates for vegetables crops in the kingdom of Saudi Arabia;Alsadon;King Saud. Univ. Res. Bul.,1998
5. Heat unit model for predicting bloom dates in rubus;Black;Horticult. Sci.,2008