1. H.P. Rang, M.M. Dale and J.M. Ritter, Pharmacology, 3rd edn., Churchill Livingstone, Edinburgh, 1995.
2. R.A. Harvey, P.C. Champe, Lippincott's Illustrated Reviews: Pharmacology, J.B. Lippincott, Philadelphia, 1992.
3. W.C. Bowman, M.J. Rand, Textbook of Pharmacology, Blackwell Scientific, Oxford, 1985.
4. J.H. Anderson, S.W. Kim (Eds.), Advantages in Drug Delivery Systems, Elsevier, Amsterdam, 1986.
5. R. Baker, Controlled Release of Biologically Active Agents, Wiley, New York, 1987.