1. Y. Osada and K.Kajiwara, Gels Handbook Volume 3: Applications, Academic Press, Amsterdam, 2001
2. F. Horkay and G. B.McKennaPhysical Properties of Polymers Handbook, American Institute of Physics, New York, 1996, p.379
3. Y. Osada and K.Kajiwara, Gels Handbook Volume 1: The Fundamentals, Academic Press, Amsterdam, 2001