1. ASME. Boiler and Pressure Vessel Code American Society of Mechanical Engineers New York
2. ASTM E 1988 Standard Method for Minimum Ignition Energy and Quenching Distance in Gaseous Mixtures. American Society for Testing and Materials Philadelphia
3. ASTM E 1985 Standard Method for Concentration Limits of Flammability of Chemicals. American Society for Testing and Materials Philadelphia
4. ASTM E 1988 Standard Test Method for Pressure and Rate of Pressure Rise for Combustible Dusts. American Society for Testing and Materials Philadelphia
5. CAA (Clean Air Act Amendments of 1990). Title VI: Stratospheric Ozone Protection. Conference Report to S. 1630 U. S. Government Printing Office Washington, D. C.