1. Method for Testing to Determine the Thermal Performance of Solar Collectors;ASHRAE Standard 93,1986
2. Solar Engineering of Thermal Processes;Duffie,1991
3. Heat Transfer;Holman,1989
4. Solar energy utilisation using parabolic trough collectors in Cyprus;Kalogirou,1991
5. Modelling of a parabolic trough collector system for hot water production;Kalogirou,1993