Farid Arya and  Trevor Hyde and  Paul Henshall and  Phillip Eames and  Roger Moss and  Stan Shire,  Current Developments in Flat-Plate Vacuum Solar Thermal Collectors.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 114(6). 715 - 719
    [viewed 20 January 2020]. Available from: https://publications.waset.org/pdf/10004587.