1. Operating experience with solar water heating;Heywood;JIHVE,1971
2. Solar water heating in South Africa;Chinnery;CSIR—Research Report 248,1971
3. Performance of flat-plate solar energy collectors. Space heating with solar energy;Hottel,1954
4. Utilization of sun and sky radiation for heating and cooling of buildings;Yellot;ASHRAE J.,1973
5. Technical Specifications for Solar Collectors,1981