1. Operational estimates of reference evapotranspiration;Allen;Agron. J.,1989
2. An update for the definition and calculation of reference evapotranspiration;Allen;ICID Bull.,1994
3. An update for the calculation of reference evapotranspiration;Allen;ICID Bull.,1994
4. Allen, R.G., Smith, M., Pruitt, W.O., Pereira. L.S., 1996. Modifications to the FAO Crop Coefficient Approach. In: Proceedings of the ASAE International Conference on Evapotranspiration and Irrigation Scheduling, 3–6 November, 1996, San Antonio, TX.
5. Allen, R., Pereira, L.A., Raes, D., Smith, M., 1998. Crop Evapotranspiration. FAO Irrigation and Drainage Paper 56, Rome, 293 pp.