1. N. F. Cardarelli, Controlled Release Pesticide Formulations, CRC Press, Cleveland, OH, 1976, pp. 20-25, 28.
2. Parameters affecting the Controlled release of copper from a Styrene -butadiene rubber matrix;Helaly;J. controlled release,1989
3. Plastics;Helaly;Rubber and Composites Processing and Applications,1991
4. K.J. Saunders, Organic Polymer Chemistry, Chapman and Hall, London, 1973, p.31, 412-416.
5. Encyclopedia of Polymer Science and Technology, V. 12, Interscience Publishers, John Wiely and Sons Inc. New York, 1970, p. 280, 294-5 .