1. Peppas, N. A. Hydrogels in Medicine and Pharmacy (CRC Press, Boca Raton, 1987).
2. DeRossi, D., Kajiwara, K., Osada, Y. & Yamauchi, A. Polymer Gels, Fundamentals and Biomedical Applications (Plenum, New York, 1991).
3. Miyata, T. Gels and Interpenetrating Polymer Networks. Supramolecular Design for Biological Applications (ed. Yui, N.) Chapter 6, 95–136 (CRC Press, Boca Raton, 2002).
4. Dusek, K. Responsive Gels: Volume Transitions I, Adv. Polym. Sci. Vol. 109 (Springer, Berlin, 1993).
5. Dusek, K. Responsive Gels: Volume Transitions II, Adv. Polym. Sci. Vol. 110 (Springer, Berlin, 1993).