1. 2. Thies, C. 1992. Microcapsules and Nanoparticles in Medicine and Pharmacy, M. Donbrow, ed. CRC Press, p. 47.
2. 3. Thies, C. 1989. Controlled Release of Drugs, M. Rosoff, ed. VCH Publishers, p. 97.
3. 4. Davis, S. S. and L. Illum. 1984. Microspheres and Drug Therapy Pharmaceutical Immunological and Medical., J. G. Mc. E. Tomlinhson, eds. Amsterdam: Elsevier, p. 97.
4. Synthesis of Biodegradable Polymers for Biomedical Utilization