1. Kaesche-Krischer, B. undH. J. Heinrich, Chem.-Ing. Techn.32, 740/747 (1960).
2. Hawkins, W. L., Oxidative degradation of high polymers. In “Oxidation and Combustion Reviews I” ed. byTipper, C. F. H. (Amsterdam 1965), 169/221.
3. Crank, J., The Mathematics of Diffusion (Oxford 1964).
4. Schütt, E., Erdöl und Kohle17, 985/991 (1964);19, 32/38 (1966).
5. Kümmerle, K., Chemie-Ing. Techn.36, 736/39 (1964).