1. DTI. The energy report, change & opportunity. June 1996. p. 169–79.
2. Anon. Rotary engine compressor combination runs on gas. Air Conditioning, Heating & Refrigeration News, 22 May 1995.
3. Longcross. Design of Sainsbury's Supermarkets Ltd — Penge, May 1998.
4. Glitz D. Engineering Services Manager, Sainsbury's Supermarkets Ltd, Stamford House, Stamford Street, London SE1 9LL. Personal communication, 16 April 1998.
5. Fundamentals handbook,1993