Anderson, A. J., Dawes E. A., Occurrence, metabolism, metabolic role, and industrial uses of bacterial polyhydroxyalkanoates. Microbiol Rev. 54, 450 (1990).
 Shah-hosseini, S., A fed-batch model for PHA production using Alcaligenes eutrophus. MSc Thesis, University of Queensland, Queesland, Australia (1995).
 Howells E., Opportunities in biotechnology for the chemical industry, Chem. Ind., 7, 5008 (1982).
 Byrom, D., Polymer synthesis by microorganisms: technology and economics. Trend Biotech. 5, 246(1987).
 Poirier, M., Production of polyhydroxybutyrate in transgenic plants, Trend Biotech, 256, 520 (1992).
 Logothetis,N., and Wynn, H. P., In “Quality through design: Experimental design, off line quality control and Taguchi’s contribution”, Clarendon press. Oxford, (1989).
 Roy, K. R. In “A primer on the Taguchi method” Van nostrand Reinhold, New York, (1990).
 Fatemi, S. S. A. and Shojaosadati S. A., Optimization of citric acid production by using experimental design in solid state fermentation by Aspergillus niger, Amirkabir J of Sci. Techno., 11, 314 (2000).
 Shojaosadati, S. A. and Babaeipour, V., Citric acid production from apple pomace in multilayer packed bed solid state bioreactor, Process Biochem, 37, 909(2000).
 Schlegel, H., Gottschalk, G., Von Bartha, R., Formation and utilization of poly-β-hydroxybutyrate by knallges bacteria (Hydrogenomonas), Nature, 191, 143(1961).
 Bradford, D. Growth and accumulation of poly-β-hydroxybutyrate by Alcaligenesis eutrophus. Honours Thesis, Department of Chemical Engineering, University of Queensland (1992).
 Braunegg, G., Sonnoleitner, B. and Lafferty, R. M., A rapid gas chromatographic method for the determination of poly-b-hydroxybutyric acid in microbial biomass, Eur J Appl Microbiol Biotech., 6, 29 (1978).
 Brandl, H., Gross, R. A., Lenz, R. W., Fuller, R.C. Pseudomonas oleovorans as a source of Poly (β- hydroxyalkanoates) for potential applications as biodegradable polyesters, Appl. Environ.Microbiol., 54, 1977(1988).
 Tabandeh, F. and Vasheghani, V., Biosynthesis of Poly(3-hydroxy butytyrate) as an biodegradable polymer, Iranian J. Pol. 12, 37 (2003).
 Hejazi, P., Vasheghani, E. and Yamini, Y., Supercritical Disruption of Ralstonia eutropha for recovery of poly(hydroxybutyrate), Biotechnol. Prog, (2003) In Press.
 Davies,L., In “Efficiency in research, development, and production: The statistical design and analysis of chemical experiments” The Royal Society of Chemistry, Cambridge, (1993).
 Haaland, P. D., In “Experimental design in biotechnology”, Elsevier, New York, 85, 16 (1989).