1. Bjerrum J. 1957 Metal ammineformation i n aqueous solution. Copenhagen: P. Haase and Son.
2. J;Dobson G. It.;Chem. Phys.,1964
3. Theory of Branching Processes and Statistics of Rubber Elasticity
4. Flory P. J. 1953 Principles of polymer chemistry. Ithaca: Cornell University Press.