1. C. Thies, Formation of degradable drug-loaded microparticles by in-liquid drying method. In: M. Donbrow (Ed.), Microcapsules and Nanoparticles in Medicine and Pharmacy. CRC Press, Boca Raton, FL, 1992, pp. 47–71.
2. E. Allémann, R. Gurny and E. Doelker, Drug-loaded nanoparticles: preparation and drug targeting issues. Eur. J. Pharm. Biopharm. 39 (1993) 173–191.
3. W.R. Gombotz and L.R. Brown, Very low temperature casting of controlled release microspheres. PCT Int. Appl. WO 9013780, Nov. 15, 1990.
4. J. Herrmann and R. Bodmeier, Somatostatin containing biodegradable microspheres prepared by a modified solvent evaporation method based on W/O/W-multiple emulsions. Int. J. Pharm. 126 (1995) 129–138.
5. M.J. Alonso, R.K. Gupta, C. Min, G.R. Siber and R. Langer, Biodegradable microspheres as controlled-release tetanus toxoid delivery systems. Vaccine 12 (1994) 299–306.