1. ACE (Advisory Council on the Environment – Hong Kong), 1995. Proposal for diesel to petrol scheme, paper discussed at the meeting of the council on 23 October 1995.
2. ACE (Advisory Council on the Environment – Hong Kong), 1998. Introducing liquefied petroleum gas taxis on a large scale, ACE Paper 46/98.
3. ACE (Advisory Council on the Environment – Hong Kong), 1999a. LPG taxi scheme, ACE Paper 27/99.
4. ACE (Advisory Council on the Environment – Hong Kong), 1999b. Actions to improve Hong Kong air quality, ACE Paper 24/99.
5. ACE (Advisory Council on the Environment – Hong Kong), 2000a. Review of the strategic sewage disposal scheme, ACE Paper 07/2000.