1. Bingham, F. T. (1982). Boron. In:Methods of Soil Analysis. Part 2. Chemical and Microbiological Properties.(Page, A. L., Miller, R. H. and Keeney, D. R., Eds.). Soil Science Society of America, Madison, WI, USA. 435–436.
2. Maas, E. V. (1990). Crop salt tolerance. In:Agricultural Salinity Assessment and Management. ASCE Manuals and Reports on Engineering.(Tanji, K. K., Ed.) No. 71. American Society of Civil Engineers, New York. USA. 262–304.