1. European Standard, 1979. Domestic cooking appliances burning gas. EN 30 Edition 2, January.
2. Haneman, D., 1975. Theory and principles of low-temperature hot air engines fuelled by solar energy. Report Prepared for US Atomic Energy Communication Contract W-7405-Eng-48.
3. Iwamoto, I., Toda, F., Hirata, K., Takeuchi, M., Yamamoto, T., 1997. Comparison of low- and high-temperature differential Stirling engines. In: Proceedings of 8th International Stirling Engine Conference, pp. 29–38.
4. A review of solar powered Stirling engines and low temperature differential Stirling engines;Kongtragool;Renewable and Sustainable Energy Reviews,2003
5. Kongtragool, B., Wongwises, S., 2003b. Theoretical investigation on Beale number for low temperature differential Stirling engines. In: Proceedings of the Second International Conference on Heat Transfer, Fluid Mechanics, and Thermodynamics, Paper no. KB2, Victoria Falls, Zambia.