WASET
    Hassan Zohoor and  Zaeem M. Moosavi,  Increase in Solar Thermal Energy Storage by using a Hybrid Energy Storage System.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2008, vol. 19(7). 403 - 408
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/2796.