1. Allen, R.G., Pereira, L.S., Raes, D., and Smith, M. (1998). Crop Evapotranspiration-Guidelines for Computing Crop Water Requirements. FAO Irrigation and Drainage Paper 56, vol. 300 (Rome: FAO).
2. Castel, J.R. (2000). Water use of developing citrus canopies in Valencia, Spain. Paper presented at: IX International Citrus Congress (Orlando, Florida).
3. Yield and physiological responses of walnut trees in semiarid conditions: application to irrigation scheduling. Chania, Greece.;Cohen;Acta Hortic.,1997