1. Council Directive 96/82/EC of 9 December 1996 (Official Journal of the European Communities No. L 10/13) on the control of major-accident hazards involving dangerous substances.
2. Statutory Instrument No. 743, 1999, The Control of Major Accident Hazards Regulations 1999, published by the Stationary Office, ISBN 0-11-082192-0.
3. J.G. Gayle and J.W. Bransford, Size and duration of fireballs from propellant explosions, NASA TM X-53314, August 1965, George C. Marshall Space Center.
4. D.G. Christopherson, Preliminary note on the clearance of trees and undergrowth by Blast; Ministry of Home Security, Research and Experiments Department, R.E.N. 450, September 1944.
5. Dr. Norman F. Scilly, 1997, private communication.