1. Survey and Mapping Office, Lands Department of Hong Kong.
2. Projections of population distribution 2006–2015,2006
3. China Light and Power Group, Hong Kong.
4. Hong Kong energy end-use data 2007,2007
5. Ullal H.S. Polycrystalline thin-film photovoltaic technologies: progress and technical issues. In: Nineteenth European PV solar energy conference and exhibition, Paris, France, 2004.