| http://www.w3.org/ns/prov#value | - Further examples of catalysts to be used in the process according to the invention, and details of the mode of action of the catalysts, are described in the Kunststoff-Handbuch, volume VII, published by Vieweg and Hochtlen, Carl-Hanser-Verlag, Munich 1966, for example on pages 96 to 102.
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