1. Peppas NA (1988) Hydrogels In: Medicine and Pharmacy, Vol I Fundamentals. CRC Press, Inc. Boca Raton, Florida
2. Kudela V (1987) Hydrogels In: Encyclopedia of Polymer Science and Engineering, Vol 7, Wiley, New York pp 783?807
3. Korsmeyer RW, Peppas NA (1981) Membr J Sci 9: 211
4. Giammona G, Carlisi B, Cavallaro G, Pitarresi G, Spampinato S (1994) J Controlled Release 29: 63 (1993)
5. Giammona G, Carlisi B, Palazzo A, Palazzo S (1989) Boll Chim Farm. 128: 62