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2. Standard Method of Test for Flammability of Plastics Using the Oxygen Index Method, Test Method D2863-74, American Society for Testing and Materials, Philadelphia (1974).
3. Standard Method for Measuring the Minimum Oxygen Concentration to Support Candle-like Combustion of Plastics (Oxygen Index), Test Method D2863-76, American Society for Testing and Materials, Philadelphia (1976).
4. British Standard Methods of Testing. Plastics, Thermal Properties. BS 2782 : Part 1 : Methods 141 A to 141 D, British Standards Institution, London (1978).