1. Andersen, E., 1998. Thermal performance of small solar domestic hot water systems in theory, in the laboratory and in practice. In: Proceedings of EuroSun 1998.
2. Solar heat pump systems for domestic hot water;Aye;Solar Energy,2002
3. BRANZ, 2004. Energy use in New Zealand households. Study Report no. SR 133—Report on the Year 8 Analysis for the Household Energy End-use Project (HEEP), Building Research Association of New Zealand.
4. Carrington, C.G., Sandle, W.J., Warrington, D.M., Bradford, R.A., 1984. Demonstration of a hot water heat pump system. New Zealand Energy Research and Development Committee, Report no. 102, ISSN 0110-1692.
5. Net energy analysis of solar and conventional domestic hot water systems in Melbourne, Australia;Crawford;Solar Energy,2004