1. Aargaard, P., Bedbur, E., Bidoglio, G., Candela, L., Nuetzmann, G., Trevisan, M., Vanclooster, M. & Vioti, P. (Eds.) (2004): COST Action 629. Proceedings of the International Workshop “Saturated and unsaturated zone: Integration of process knowledge into effective models”. 5–7 May 2004, Rome.
2. Allen, R. G., Pereira, L. S., Raes, D. & Smith, M. (1998): Crop evapotranspiration — Guidelines for computing crop water requirements — FAO Irrigation and drainage paper 56. FAO — Food and Agriculture Organization of the United Nations, Rome. http://www.fao.org/docrep/X0490E/x0490e00.htm
3. ASCE (1996): Hydrology Handbook. ASCE manuals and reports on engineering practice. American Society of Civil Engineers.
4. ASTM D 2487 (2000): Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System). American Society for Testing and Materials, West Conshohocken, Pennsylvania.
5. ASTM D 4643 (2000): Standard Test Method for Determination of Water (Moisture) Content of Soil by the Microwave Oven Method. American Society for Testing and Materials, West Conshohocken, Pennsylvania.