1. The addition of ammonium salts or a phosphate ester to herbicides to control Agropyron repens (L) Beauv.
2. L. D. Bradshaw, S. R. Padgette, S. L. Kimball, and B. H. Wells .1997 .Perspectives on glyphosate resistance., Weed Technol, 11 :189 –198 .
3. Phloem translocation of strong acids-glyphosate, substituted phosphonic and sulfonic acids-inRicinus communisL
4. K. L. Carlson, and O. C. Burnside .1984 .Comparative phytotoxicity of glyphosate, SC-0224, SC-0545, and HOE-00661., Weed Sci, 32 :841 –844 .
5. W. R. Fehr, C. E. Caviness, D. T. Burmood, and J. S. Pennington .1971 .Stage of development descriptions for soybeans [Glycine max(L.) Merrill]., Crop Sci, 11 :929 –931 .