1. Factors that influence the critical oxygen index of various solids
2. Anomalous behaviour in certain versions of the critical oxygen index test
3. Standard Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index), Test Method D2863-77, American Soceity for Testing and Materials, Philadelphia (1977).
4. See, for example, Determination of Minimum Oxygen Concentration for Flame Propagation Following Top Surface lgnition of Vertically Oriented Specimens, Australian Standard 2122.2-1978. Standards Association of Austrialia, North Sydney (1978).
5. ‘Perspex’ acrylic sheet. Technical data sheet. Technical data sheet PX TD 225, 3rd edition, ICI Plastics Division (1975).