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Number | Date | Country |
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WO 9502627 | Jan 1995 | WOX |
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D. Lyman et al., "Die Makromolekulare Chemie", Polycarbodiimides and their Derivatives, Band 67, Apr. 1963, pp. 1-8. |
T. Campbell et al., "High Polymers Containing the Carbodiimide Repeat Unit", The Journal of Organic Chemistry, vol. 28, No. 8, Aug. 1963, pp. 2069-2075. |