1. Underground longterm storage of solar energy—An overview
2. , , and (1979). ‘Performance of an inexpensive solar collector/storage system in ground’, J. Phys. D, App. Phys. (In press).
3. (1970). Thermal Environmental Engineering Practice, New Jersey, Prentice-Hall Inc.
4. and (1974). Solar Energy Thermal Processes, New Delhi, Wiley.