1. Avnimelech, Y, A. Cohen and D. Shkedy. 1993. Can we expect a consistent efficiency of municipal waste compost application? Compost Science and Utilization 1:7–15.
2. Chen, Y, Senesi, S., and Schnitzer, M., 1977. Information provided on humic substances by E4/E6 ratios. Soil Sci. Soc. Amer. J. 41, 352–358.
3. Chen, Y, and Aviad, T., 1990. Effects of humic substances on plant growth. In: P. MacCarthy, C.E. Clapp, R.L. Malcolm and PR. Bloom (eds.), Humic Substances in Soil and Crop Sciences: Selecteds Readings. Proceedings of a symposium cosponsored by the International Humic Substances Society, Chicago, Illinois, 161–186.
4. Chen, Y, Y. Inbar and Y. Hadar. 1992. Composted residues reduce peat and pesticide use. BioCycle 6:48–51.
5. Chen, Y, Magen, H., and Riov, J., 1994. Humic substances originating from rapidly decomposing organic matter: properties and effects on plant growth. In: N. Senesi, and T.M. Miano (eds.), Humic Substances in the Global Environment and Implications on Human Health. Elsevier Science, Amsterdam, 427–145.