1. Ahrland S, Dahlgren A and Persson I 1990 Stabilities and hidrolysis of some iron(III) and manganese(III) complexes with chelating ligands. Acta Agric. Scand. 40, 101–111.
2. Allison J D, Brown D S and Novo-Gradac K J 1990 MINTE-QA2/PRODEFA2, a geochemical assesment model for environmental systems: version 3.0 user’s manual. Environ. Lab. U.S. EPA. Athens. Georgia.
3. Barak P and Chen Y 1987 Determination of FeEDDHA in soils and fertilixers by anion exchange chromatography. Soil Sci. Soc. Am. J. 51, 893–896.
4. Cadahía C, García P, Lucena J J, Sarro M J and Gárate A 1988 Solubility of Fe, ?n, Cu and Zn fertilizers as a function of the substrate type in a drip irrigation system. Acta Hortic. 222, 179–186.
5. Hellín E 1991 Corrección de la clorosis férrica del limonero. In El Aguay los Fertilizantes, Fertirrigacion Localizada. Ed. R Madrid, pp 251–264. Región de Murcia Editorial.